In this lesson we'll look at closed syllables (i.e. those ending in a consonant) with short vowels. We've already covered /a/, /i/, /u/, /ʉ/ and (unwritten) /o/ which were part of the original Thai script. That leaves /e/, /ɛ/, /ə/ and /ɔ/.
To start with /ə/, there is (I believe) only one word in Thai with this vowel sound, เงิน (meaning money or silver), pronounced /ŋən/. The vowel is written exactly the same as the long form.
For the other vowel sounds the solution was to introduce a new symbol, ◌็ , known as ไม้ไต่คู้ (/máyˑtàyˑkhúu/) which shortens the syllable's vowel. It's written over the first consonant of a syllable (or the second consonant if the syllable starts with a consonant cluster).
Here are some examples:
| Word | Pronunciation | Meaning | 
|---|---|---|
| เป็น | /pen/ | to be | 
| แข็ง | /khɛ̌ŋ/ | strong | 
| น็อค | /nɔ́k/ | to knock | 
Contrast the shape of this character, ◌็ , with tone mark 3, ◌๊ .
Here are some common words to practise reading.
There are no short, closed diphthongs.
One oddity is the word ก็ which is pronounced /kɔ̂ɔ/. It's difficult to translate into English, but the meaning is something like "also" or "subsequently".
You may have noticed that none of the short syllables has a tone mark. So, how does Thai handle syllables which would appear to require a ◌็ and a tone mark? In short, it doesn't. There can either be a ◌็ or a tone mark − never both, with the tone mark taking precedence. The following common words are all pronounced with a short vowel sound, though written long.
| Word | Pronunciation | Meaning | 
|---|---|---|
| เช่น | /chên/ | for example | 
| เล่น | /lên/ | to play | 
| เส้น | /sên/ | line | 
| เด่น | /dèn/ | prominent | 
| เล่ม | /lêm/ | [counter for books, knives, swords, &c.] | 
| แห่ง | /hɛ̀ŋ/ | place | 
| ตำแหน่ง | /tamˑnɛ̀ŋ/ | location | 
| แบ่ง | /bɛ̀ŋ/ | to share | 
| แหล่ง | /lɛ̀ŋ/ | centre | 
| แผ่นดิน | /phɛ̀nˑdin/ | land | 
| แต่ง | /tɛ̀ŋ/ | to decorate | 
| หนาแน่น | /nǎaˑnɛ̂n/ | abundantly | 
| ต้อง | /tɔ̂ŋ/ | must | 
| ห้อง | /hɔ̂ŋ/ | room | 
| ป้องกัน | /pɔ̂ŋˑkan/ | to protect | 
| เกี่ยวข้อง | /kìawˑkhɔ̂ŋ/ | to relate | 
You just need to memorise them as exceptions.
Start by drawing the loop clockwise. Complete the character in one, continuous stroke.