The Thai script
Thai Consonants · ข kho khai

#2 of forty-four · high class

ข

kho khai

ข ไข่ · egg

High class อักษรสูง

High class + no mark on a live syllable = rising tone; it reaches tones the low twins can't.

Pronunciationinitial /kʰ/
ขlooped · print
ขloopless · modern
ขhandwritten
Initial sound/kʰ/RTGS kh · Paiboon k
As finalk · แม่กกcloses a syllable → “dead”
Frequency#20 of 44common
CodepointU+0E02
ข ไข่ (kho khai) — Thai consonant meaning 'egg', engraved specimen plate
ไข่ · egg — engraved specimen plate
๑What tone does ข give?class isn’t trivia — it’s the tone engine

A consonant’s class exists for one reason: it decides the tone. High class + no mark on a live syllable = rising tone; it reaches tones the low twins can't. Here’s every outcome for ข as the initial:

Syllable– No mark◌่ mái èek◌้ mái thoo
Liveopen or sonorant endrisinglowfalling
Deadstop end or short vowellowlow—

Live syllable — open or sonorant end

–No markrising
◌่mái èeklow
◌้mái thoofalling

Dead syllable — stop end or short vowel

–No marklow
◌่mái èeklow

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 →

๒Easy to mix upby shape, and by sound

Looks like — watch the shape

ขkho khai/kʰ/ · high
vs
ชcho chang/tɕʰ/ · low

The tell: ข has a small head-loop at the top-left; ช drops the loop and rises to a sharper point.ข is /kʰ/ high · ช is /tɕʰ/ low.

Sounds like — watch the spelling

Same initial /kʰ/:

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

๓In real wordsthe letter at work
๔How 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.

๕Where it comes fromorigin & lineage

Indic — Sanskrit aspirate kh.

OriginIndic
LineageBrahmi → Khmer → Thai
UnicodeU+0E02
Statusin current use