P23 · "The one who is …-ing" puts on a full set of hats + "more …" opens for business — chest-out, tucked-in, Thai kept both shapes for you
Draft · in reviewTeacher notes / sources (students may skip)
Corresponds to: Perry Lesson XXIII (§255–262) = SKT บทที่ 23 (23.1–23.10). First half of W13. Sources: Perry §255–262 (backbone: śreyas comparative paradigm + jīvant participle paradigm + the mahant special case) + Goldman §20.11.m / §21.4 (plainly states the two comparative systems are "unrelated," and its candid tone about irregulars needing to be memorized one by one) + Goldman Lesson 15 (participle as modifier, the case-agrees-with-the-modified-noun safeguard) + Ruppel Ch.25 / Ch.35 (-ant declension and -yas comparative both belong to the s/nt strong/weak-stem family, taught side by side for comparison) — comparative notes in 260702-P13-P30-四源挖料. Wherever SKT vols 21–25 and the Perry XXIII tables carry OCR noise, the original is not cited (caveat note, same precedent as P16/P17); paradigms are entered only after cross-checking across three sources. No draft base text exists for the consonant-stem unit (07); the story and classroom flow were designed independently by the four-corner team, with all verbs recycled from earlier lessons (no new finite forms). Core insight: the two shapes, chest-out and tucked-in — in P18 you got hold of the participle stem by "cutting -i" (recognition only); today that stem splits into two bodies: all nominatives plus singular/dual accusative = chest-out (-ant), everything else = tucked-in (-at). The comparative "more …" (-yas) reuses this exact same chest-out/tucked-in logic. Flagship anchor: มหันต์ and มหัต are the same Sanskrit word mahant in two shapes — chest-out มหันต์ (strong stem mahānt) and tucked-in มหัต (weak stem mahat), Thai borrowed both shapes.
"Today's star, you already recognize twice over — the same Sanskrit word, Thai kept two shapes of it for you:
มหันต์ (Thai: "great, severe" — มหันตภัย "great calamity") and มหัต (Thai: "great" — the Royal Institute Dictionary's own entry for มหัต glosses it as "ว. มหันต์, ใหญ่, มาก").
These aren't two words — they're two bodies of the Sanskrit word mahant ("great"): chest thrown out is mahānt (มหันต์), body tucked in is mahat (มหัต).
Thai borrowed both postures of a single Sanskrit word — what you're learning today is exactly this chest-out/tucked-in shape-shifting trick.
While we're at it, meet the comparative relative of an old friend: ครู = guru (teacher) you say every day; its 'more venerable' form garīyas runs the same chest-out/tucked-in routine.
And one sun that lives in Thai: อาทิตย์ (วันอาทิตย์ "Sunday") ← āditya — today's story will use it."
(The first half of มหันตภัย is มหันต = chest-out mahant; the second half, ภัย = bhaya "danger." Thai มหา "great" (as a prefix) and มหันต์ "huge" (as an independent adjective) belong to the same √mah family — one used as a prefix, one as a standalone adjective.)
(Every verb is recycled: paśyati←P05, vadati←P01, tiṣṭhati←P14 (to stand) — no new finite forms this lesson. The participles tiṣṭhantam (chest-out, accusative) and vadan (chest-out, nominative) are both recycled verbs wearing an "is …-ing" hat; the comparative garīyān (more venerable) is guru's own "more…" body. Old-friend nouns: śiṣya (ศิษย์, an L00 A1 word), guru (ครู, P18), dharma (ธรรม, the P02 headliner), yaśas (ยศ, the P21 s-family); the only new friend is āditya (อาทิตย์). All sandhi recycled: ๑ śiṣyas tiṣṭhantaṃ (aḥ before voiceless dental t → as, P02), guruṃ／tiṣṭhantaṃ (m + consonant → ṃ); ๒ gurur dharmaṃ (uḥ + voiced → ur, the P02 rāmo family); ๓ gurur āditya (uḥ + vowel → ur), āditya iva (aḥ + non-a vowel i, visarga drops leaving hiatus, P02); ๔ gurur yaśasā (uḥ + y → ur). Recognition points per sentence: ๑ ศิษย์/ครู; ๒ ครู/ธรรม; ๓ ครู/อาทิตย์; ๔ ครู/ยศ/garīyas (←ครู).)
Line one: "is …-ing" puts on a full set of hats (present participle -ant).
"In P18 you learned a rule of thumb: the present-tense 'they' form minus -i = the participle stem (gacchanti→gacchant-). Today that stem splits into two bodies:
chest thrown out (-ant, with an extra n) = all nominatives + accusative singular/dual + vocative; body tucked in (-at, no that n) = everything else on the hat rack.
'The standing teacher (accusative)' = tiṣṭhantam (chest-out); 'by means of the standing teacher (instrumental hat)' = tiṣṭhatā (tucked-in) — the only difference is that n."
"The participle hat has an iron rule: it agrees with the noun it modifies — regardless of who's doing the action versus who's receiving it.
vadan guruḥ ('the speaking teacher,' both nominative); tiṣṭhantam gurum ('the standing teacher,' both accusative) — the participle changes hats along with its noun; don't ask 'spoken by whom.'"
"is …-ing" full set of hats (jīvant "living" — √jīv, the same "life" as Thai ชีวิต; pending Heritage machine-checking)
| Masc chest-out/tucked-in | Neuter | |
|---|---|---|
| Sg Nom/Voc | जीवन् jīvan | जीवत् jīvat |
| Sg Acc | जीवन्तम् jīvantam (chest-out) | जीवत् jīvat |
| Sg Instr | जीवता jīvatā (tucked-in) | — |
| Sg Loc | जीवति jīvati (tucked-in) | — |
| Du Nom/Acc/Voc | जीवन्तौ jīvantāu (chest-out) | जीवन्ती jīvantī |
| Pl Nom/Voc | जीवन्तः jīvantaḥ (chest-out) | जीवन्ति jīvanti |
| Pl Acc | जीवतः jīvataḥ (tucked-in) | जीवन्ति jīvanti |
| Pl Instr | जीवद्भिः jīvadbhiḥ (tucked-in · pada) | — |
| Pl Loc | जीवत्सु jīvatsu (tucked-in · pada) | — |
"Feminine wears an -ī hat: not tucked-in exactly — it takes the neuter's nominative-dual shape and adds on — jīvant's feminine is jīvantī (declined like nadī, your old friend from P11).
Once a pada ending (the 'heavy tail' group bhyām/bhis/su) is attached, the tucked-in t follows the P20 'four tails, external sandhi' rule and changes to d: jīvadbhiḥ. The same old rule, in a new place."
Line two: the mahant special case + flagship anchor.
"Most participles are chest-out -ant; mahant ("great") is special — it lengthens a to mahānt when chest-out: nominative singular mahān, accusative singular mahāntam; tucked-in stays as mahat.
This is the anchor in action: มหันต์ = chest-out mahānt, มหัต = tucked-in mahat — Thai kept both shapes for you to compare side by side."
Line three: "more…" opens for business (comparative -yas).
"Put a 'more …' hat on an adjective. Sanskrit has two systems; today we meet the irregular one first (-yas): it's not a regular suffix, you have to memorize each one individually —
guru (heavy/venerable) → garīyas (more venerable); vara (good, Thai พร "blessing") → varīyas (better). The paradigm word is śreyas (more excellent).
This comparative is a relative of the P21 s-family: chest-out -yāṃs, tucked-in -yas, as→o before a pada ending (śreyo-), the same flavor as manas→manobhiḥ."
"more…" full set of hats (śreyas "more excellent" — s-family, reusing the P21 muscle memory; pending Heritage machine-checking)
| Masc chest-out/tucked-in | Neuter | |
|---|---|---|
| Sg Nom | श्रेयान् śreyān (chest-out) | श्रेयः śreyaḥ |
| Sg Acc | श्रेयांसम् śreyāṃsam (chest-out) | श्रेयः śreyaḥ |
| Sg Instr | श्रेयसा śreyasā (tucked-in) | — |
| Sg Loc | श्रेयसि śreyasi (tucked-in) | — |
| Du Nom/Acc | श्रेयांसौ śreyāṃsāu (chest-out) | श्रेयसी śreyasī |
| Pl Nom | श्रेयांसः śreyāṃsaḥ (chest-out) | श्रेयांसि śreyāṃsi |
| Pl Acc | श्रेयसः śreyasaḥ (tucked-in) | श्रेयांसि śreyāṃsi |
| Pl Instr | श्रेयोभिः śreyobhiḥ (tucked-in · pada, as→o) | — |
| Pl Loc | श्रेयःसु śreyaḥsu (tucked-in · pada) | — |
"Feminine wears the same -ī: śreyasī (tucked-in śreyas + ī, following nadī). 'Than…' uses the ablative hat: 'the teacher is more excellent than the student' = guruḥ śiṣyāt śreyān;
or use the instrumental hat meaning 'in terms of…': in the story, sentence ๔, guruḥ yaśasā garīyān ('in fame more venerable') — both phrasings are accepted."
Building blocks (use-first, analyze-later — this lesson's set): iva (like, as, paired with the preceding noun) — story sentence ๓, ādityaḥ iva "like the sun," a high-frequency little simile word, use-first.
TPRS wrap-up: "What kind of teacher does the student look at? (tiṣṭhantam) What is the speaking teacher like? (āditya iva) Who is more venerable in fame? (garīyān)" — students answer with the chest-out form, choral recitation of the four-sentence sandhi version.
- "Chest-out, tucked-in: the participle stem (obtained by cutting -i in P18) has two bodies — chest-out -ant = all nominatives + accusative singular/dual + vocative; tucked-in -at = everything else. Differs by one n (tiṣṭhantam↔tiṣṭhatā)."
- "Participle's iron rule: the hat follows the noun it modifies, regardless of who does versus receives the action — vadan guruḥ (both nominative), tiṣṭhantam gurum (both accusative). Feminine wears -ī (jīvantī, following nadī)."
- "'More…' (-yas) is irregular, memorize each one: guru→garīyas, vara→varīyas, paradigm word śreyas; chest-out -yāṃs / tucked-in -yas, as→o before a pada ending — a relative of the P21 s-family. 'Than…' uses the ablative hat."
- "Flagship comparison: มหันต์ = chest-out mahānt, มหัต = tucked-in mahat (Thai kept both bodies). ★Sound-rule day (D5): อุตมะ's word-final ◌ะ — see §6."
Chest-out/tucked-in comparison slices: 🔇tiṣṭhantam↔tiṣṭhatā🔇 / 🔇jīvantam↔jīvatā🔇 / 🔇gacchantam↔gacchatā🔇 (differing by one n, each read slowly); three-in-a-row participle nominatives: jīvan / gacchan / vadan (chest-out nominative singular, ending -an); pada tucked-in forms: jīvadbhiḥ / jīvatsu (t→d / t unchanged, recycling P20's "four tails"); comparative s-family: 🔇śreyān↔śreyāṃsam🔇↔śreyasā (chest-🔇out↔tucked🔇-in), śreyobhiḥ (as→o, back-to-back comparison with P21's manobhiḥ); mahant special case: 🔇mahān↔mahāntam🔇↔mahatā (lengthened mahā compared against มหันต์/มหัต); four story sentences in both versions; sandhi slices: gurur dharmaṃ / gurur āditya / gurur yaśasā (uḥ→ur, three examples side by side, all recycled from P02).
(Teacher-reference words: Perry XXIII/SKT 23 word-list items not used in the story — นินทา←nindā (nind, "to blame," everyday Thai meaning "gossip"), มาลา←mālā (garland), ประกาศ←prakāśa (prakāśin "shining" → Thai "announcement," a false friend), ภูต←bhūta ("existent thing" → Thai "ghost," a false friend, Perry bhūta), สัตว์←sattva (existence/living being, related to the √as family sant/sat — Thai meaning skews toward "animal," used as a semantic bridge rather than a direct participle hook), พร←vara (blessing; the positive form of the comparative varīyas), อุดร←uttara ("north"; a fossilized -tara cousin — its declension and formal teaching are reserved for a later lesson, D3 is not claimed this lesson — D3 belongs to P25's อุดร double-consonant simplification); the comparative/superlative -iṣṭha type (gariṣṭha/śreṣṭha) and the full -tara/-tama system are reserved for around P33 + Crystallization Lesson Seven; specific participles other than jīvant (nayant/bhavant/kurvant) are reserved for decode-and-reclaim, not yet on the student page.)
This lesson's skeleton feeds into Crystallization Lesson Seven (the panoramic view of consonant stems, covering P22–P25: -in / -ant / -yas / -mant·-vant / -añc, strong/weak stems all on one wall for comparison): "chest-out is chest-out, tucked-in is tucked-in" — the -ant participle (this lesson) and -yas comparative (this lesson) line up alongside the -in family (P22), -mant/-vant (P24), and -añc (P25) all registered together, sharing one set of chest-out/tucked-in logic; the neuter nominative/accusative plural's inserted nasal (jīvanti/mahānti, recycling P20's jaganti) and the pada-ending external sandhi (P20) converge in the master chart. The comparative/superlative's other rule system (-tara/-tama = the fossilized อุตร/อุตม system; the -iṣṭha superlative) is reserved for around P33 and formally opened there — this lesson only previews it and warms up with the Thai forms.