Crystallization Lesson Seven · the Consonant-Stem Panorama · Filing the Comparative · the Irregular Fossil Gallery

One — Draw It Out (8 minutes) — blanks before the chart

Draw a long row of blanks on the board, no chart name yet.

"This past month you opened up a whole new continent of consonant endings. Shout out what you already know.
'The wealthy master (nominative)'?" (dhanī svāmī) "'See the yogi (accusative)'?" (yoginam)
"'The Lord (nominative)'?" (bhagavān) "'King (nominative)'?" (rājā) "'The king's (tucked-in genitive)'?" (rājñaḥ)
"'The standing teacher (accusative)'?" (tiṣṭhantam gurum) "'More venerable, in fame'?" (yaśasā garīyān)
"'The knower (nominative)'?" (vidvān) "'Go north'?" (udañcam) "'Walk the great road'?" (panthānam)

(A dozen-plus blanks light up in quick succession.)

"See that? The master shedding its tail, the Lord dropping its gatekeeper, the teacher puffing out and tucking in, the knower shapeshifting fat and thin, and the road switching between two frames — you already know all of it.
Today we do three things: **line up the eight consonant-stem families on one map to see their shared rules, file the two comparative systems, and put three irregular old words into the fossil gallery.
What's left isn't new material — it's assembling a month's worth of parts into one full map.**"

Two — Naming One: the General Rule of Changing Stance (10 minutes) — one motion governs the whole continent

"This past month, every consonant-final family has been doing the same thing: changing shape according to case. Today we file this motion into one instruction manual."

The three shapeshifting motions (the shared grammar of consonant stems):

• Which hats count as strong (the cases that come out chest-out): all nominatives + accusative singular/dual + vocative (following the participle/comparative pattern); -vant/-an families are slightly narrower (nom/voc/acc singular + nom plural), everything else tucks in. Students just need to remember the broad rule of "nom/voc/acc are strong, everything else is weak" — the fine boundaries can be looked up in the full crystallization chart.
• One old rule runs through the whole set: when the tucked-in form meets a heavy-tail hat (-bhiḥ/-bhyām/-su group), the final sound turns voiced per P20's "four-tail external sandhi" — jīvadbhiḥ／bhagavadbhiḥ／vidvadbhiḥ, the same motion as P20's marudbhiḥ, just applied elsewhere.
• Thai keeps "two shapes" for you as living teaching aids: มหันต์／มหัต (strong mahānt／weak mahat), ราชัน／ราชา (stem shape／at-the-door shape), อาตมัน／อาตมา — one Sanskrit word, both shapes borrowed into Thai.

Three — Naming Two: the Consonant-Stem Panorama (16 minutes) — eight families' shapeshifting on one map

"P20 opened the consonant family, P21 covered the s-family's three faces, P22–P25 added five more (-in, -vant/-mant, -an, -vāṃs, -añc), and P26 swept through three irregular old words. Today they all go up on one map. Read across the three columns to see strong/weak; read down each column to see each family's special trick."

The consonant-stem panorama (at-the-door shape／chest-out／tuck-in, three columns compared, recycling each lesson's representative word)

"One sentence sums up the whole map: consonant stems all shapeshift — some have three tiers (fat/thin/middle), some have two (chest-out/tuck-in), some shed their tail, some shrink their middle vowel, some have three faces — but the shared method is just one line: watch the case, change your shape."

• Already lit up: every cell of this map appeared in P20–P26 (each lesson's promise of "displayed in Crystallization Lesson Seven" comes due today). The pattern revealed by comparing the three columns: the at-the-door shape (nom. sg) is often different from both chest-out and tuck-in — dropping the gatekeeper + lengthening the preceding vowel is its own specialty.
• The neuter-plural old recipe gains three more families (Crystallization Lesson Six already established "lengthen + nasalize + i"): jīvanti (-ant)／mahānti (-vant special case)／nāmāni (-an) now join the inserted-nasal family, vidvāṃsi (-vāṃs) takes the round-dot version — one recipe serves seven or eight families, the neuter plural has only one secret (recycling P20's jaganti, P21's manāṃsi).
• One universal rule for consonant-stem feminines: the tuck-in side + ī, always following nadī (P11) — svāminī／jīvantī／śreyasī／viduṣī／prācī／bhagavatī／rājñī all wear the same hat. "However fierce the consonant family gets, the feminine always returns to nadī."

Four — Naming Three: Filing the Comparative's Dual System + Present Participle Full Declension on the Wall (8 minutes)

"P23 gave adjectives the 'more...' hat, but only taught the irregular set. Today we file the comparative/superlative's two systems and align them with the formal full chart."

The comparative/superlative dual system (filing card)

• Already lit up: the irregular -yas full chart was established in P23 (right there in the panorama); today just adds its superlative partner -iṣṭha (śreṣṭha "highest" — already used in P26 sentence ๔, "dharmasya panthāḥ śreṣṭhaḥ" — recognition is enough).
• Regular -tara/-tama is only filed today, not expanded: the Thai fossils อุดร (uttara, north = more up/north)／อุดม (uttama, supreme) are living evidence of this system, and D3 (consonant-cluster simplification) was just claimed via อุดร in P25. This system's proper drilling is left for around P33 — for now students just need to know "Sanskrit has two systems for 'more/most,' one you memorize individually, one you just attach a suffix to."
• A prize-winning cross-comparison recall: มหันต์ (strong mahānt)／มหัต (weak mahat) is the living teaching aid for the -ant participle's chest-out/tuck-in (P23), which is exactly the same motion as the comparative's chest-out/tuck-in — mahant and śreyas sit side by side in the panorama, letting you see through the fact that "both families share the same chest-out/tuck-in shapeshifting."
• "The one that's doing" gets its full declension on the wall: P18 only taught recognizing the clipped -i form, P23 filled in the full set of hats, and today it formally settles into the -ant row of the panorama — the participle's iron law bears repeating: the hat follows the noun it modifies, regardless of who does or receives the action (vadan guruḥ is always nominative／tiṣṭhantam gurum is always accusative).

Five — Review Column (4 minutes) — the Irregular Fossil Gallery + Decoder Wrap-Up, No New Rules This Lesson

The Fossil Gallery (P26's finale, a passive-recognition stance):

The most commonly used are the least well-behaved. Road path／day ahan／eye akṣi, plus P16's cow go (โค) and man pums — worn smooth from overuse, like English "be/go/child."
The gallery is for recognition only, no need to write it out from memory: seeing अक्ष्णा and recognizing "eye · instrument hat" is enough. path switches between two frames (panthāḥ／pathā), akṣi/ahan shrink their middle vowel (akṣṇā／ahnā).
An honest discipline of anchoring: of the three words, only path has a genuine cognate hook (บถ: ตรีบถ/กรรมบถ) — ahan and akṣi are avoided by Thai, which borrowed synonyms with the same meaning instead: same meaning is not the same as same origin (มรรค ≠ path, จักษุ/เนตร ≠ akṣi, ทิวา/ทิน ≠ ahan) — don't be fooled by meaning when checking etymology.

Decoder review (no new claim this lesson, the rule pool winds down here):

• D4, dropping the word-final น (just issued in P22): โยคิน↔โยคี, สวามี←svāmin, มนตรี←mantrin — the same drama as dhanin→dhanī, polished side by side.
• D5, adding a final ◌ะ to show the tail (just issued in P23): อุตมะ←uttama (contrasted with D1's tail-dropping อุดม); alongside ราคะ／หิมะ.
• D3, collapsing a consonant cluster (just issued in P25): อุดร←uttara (tt→ด), อุดม←uttama — precisely the origin of this lesson's comparative fossils.

"These three are rules that were freshly claimed within the past half-month, plus P26's 'same meaning isn't the same origin' myth-busting lesson — today we sweep through them all side by side. A crystallization lesson doesn't add new rules; the rule pool closes here."

Six — Cognate Production + Second Wave (8 minutes)

• Cognate production: everyone draws a consonant-stem noun (any of the eight families) and a recycled verb from their kośa, and on the spot (a) sets it into its three shapes — "at-the-door/chest-out/tuck-in,"

(b) makes a sentence in the past tense. Sample: rājā bhagavantam apaśyat (the king saw the Lord)／vidvān panthānam agacchat (the knower walked the great road)／ guruḥ śiṣyāt śreyān (the teacher is better than the student). Teacher recasts, no interruptions.

• Second wave (Assimil method): retell P24's "the king pays homage to the Lord" story using Thai prompts, requiring the character to be swapped for a different consonant-stem word

("the knower pays homage to the Lord" — trying vidvān／bhagavantam as a swap), then recast once more into a comparative ("the Lord is more venerable than the king" — bhagavān rājñaḥ śreyān). Four weeks' worth of CI input, and today it's the story's turn to shapeshift and speak.

• Closing preview: "The whole continent of consonant stems is now covered — the map of noun declension is complete. From here on we return to the verb's advanced faces — the perfect tense (has done), the future tense (will do), the conditional mood — these are new tenses of action yet to come;

the intuition you've built up, 'watch the case/watch the tense, change your shape,' works just as well when applied to verbs. The consonant-stem panorama stays on the wall — check it any time you need to."

Chart cards ×5: the general-rule-of-changing-stance card (the three motions — chest-out/tuck-in/at-the-door + the four-tail external sandhi t→d), the consonant-stem panorama card (eight families × at-the-door/chest-out/tuck-in three columns + each shapeshifting trick, including the neuter-plural old recipe across three families + a quick-reference side panel for the feminine tuck-in+ī), the comparative dual-system filing card (irregular -yas/-iṣṭha memorized individually vs. regular -tara/-tama attached; the อุดร/อุดม fossils; -tara/-tama's formal teaching left for P33), the present-participle full-declension card (the whole set of -ant hats + the "the hat follows the noun" iron law, connecting to P18/P23), the irregular fossil gallery card (path/ahan/akṣi + go/pums, passive recognition, recognize-don't-produce; the "same meaning isn't same origin" myth-busting). (No new Decoder card this lesson; D3/D4/D5 stay on their just-issued P25/P22/P23 cards, A5/B5/C4/C6/D6 untouched, reviewed side by side only.)