The Thai script
Thai Consonants · ซ so so

#11 of forty-four · low class

ซ

so so

ซ โซ่ · chain

Low class อักษรต่ำ

Low class is the shifted class — the same mark lands a different tone than on mid or high.

Pronunciationinitial /s/
ซlooped · print
ซloopless · modern
ซhandwritten
Initial sound/s/RTGS s · Paiboon s
As finalt · แม่กดcloses a syllable → “dead”
Frequency#27 of 44rarer — mostly in Pali/Sanskrit loans
CodepointU+0E0B
ซ โซ่ (so so) — Thai consonant meaning 'chain', engraved specimen plate
โซ่ · chain — engraved specimen plate
๑What tone does ซ give?class isn’t trivia — it’s the tone engine

A consonant’s class exists for one reason: it decides the tone. Low class is the shifted class — the same mark lands a different tone than on mid or high. Here’s every outcome for ซ as the initial:

Syllable– No mark◌่ mái èek◌้ mái thoo
Liveopen or sonorant endmidfallinghigh
Dead · longlong vowel + stopfallingfallinghigh
Dead · shortshort vowel + stophighfallinghigh

Live syllable — open or sonorant end

–No markmid
◌่mái èekfalling
◌้mái thoohigh

Dead · long syllable — long vowel + stop

–No markfalling
◌่mái èekfalling
◌้mái thoohigh

Dead · short syllable — short vowel + stop

–No markhigh
◌่mái èekfalling
◌้mái thoohigh

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
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

Native Thai — a low-class /s/ (a notched ช).

OriginNative Thai — no Sanskrit/Pali source letter
LineageBrahmi → Khmer → Thai
UnicodeU+0E0B
Statusin current use