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Thai Consonants · ko kai
01 / 44 kho khai

#1 of forty-four · mid class

ko kai

ไก่ · chicken

Mid class อักษรกลาง

Mid class is tonally neutral — every tone mark maps to exactly one tone.

Pronunciationinitial /k/
looped · print
loopless · modern
handwritten
Initial sound/k/RTGS k · Paiboon g
As finalk · แม่กกcloses a syllable → “dead”
Frequency#3 of 44a day-one letter — you’ll meet it immediately
CodepointU+0E01
ก ไก่ (ko kai) — Thai consonant meaning 'chicken', engraved specimen plate
ไก่ · chicken — engraved specimen plate
What tone does give?class isn’t trivia — it’s the tone engine

A consonant’s class exists for one reason: it decides the tone. Mid class is tonally neutral — every tone mark maps to exactly one tone. Here’s every outcome for as the initial:

Syllable No mark◌่ mái èek◌้ mái thoo◌๊ mái trii◌๋ chattawa
Liveopen or sonorant endmidlowfallinghighrising
Deadstop end or short vowellowlowfalling

Live syllable open or sonorant end

No markmid
◌่mái èeklow
◌้mái thoofalling
◌๊mái triihigh
◌๋chattawarising

Dead syllable stop end or short vowel

No marklow
◌่mái èeklow
◌้mái thoofalling

Change the initial to another class and the same marks produce different tones — that shift is what makes tone a small system, not 44 separate facts. Derive tones on the Tones surface

Easy to mix upby shape, and by sound

Looks like — watch the shape

ko kai/k/ · mid
vs
tho thung// · high

The tell: ถ has a small head-loop at the top-left and a longer tail; ก has neither — just a plain shoulder. is /k/ mid · is // high.

ko kai/k/ · mid
vs
pho samphao// · low

The tell: ภ grows a tall vertical stem on its right side; ก stays low and compact, with no ascender. is /k/ mid · is // low.

Sounds like — watch the spelling

Same initial /k/:

stands alone — no other consonant makes this initial sound, so it’s always . One of the easy ones to spell.

Same final /k/ — identical at a word’s end:

In real wordsthe letter at work
How it’s writtenstart at the head

Start at the head — the little loop — then one continuous stroke. Written between the guide lines, the body sits in the middle band.

Where it comes fromorigin & lineage

Indic — Sanskrit k. The base /k/, common everywhere.

OriginIndic
LineageBrahmi → Khmer → Thai
UnicodeU+0E01
Statusin current use