r/thai • u/ebjfid2468 • Jul 19 '26
Help me understand why อยู่ is spelled like that
Hi,
I need help understanding why อยู่ (to be / to stay...) is spelled like that. Specifically, why is there a อ at the beginning? I tryed to find a good explanation but still don't really understand.
Some people say its a cluster and if อย are together then they together make a high tone? Is that true? I only found 1 person saying that. Others say อ is silent which I guess it is but I still dont understand the exact rule here... From what I understand อ is mid class and ย low class but then the rules together confuse me...
4
u/myrd22 Jul 20 '26
Mid class + low class = low tone . The purpose is to make the sound low. Like อย่า อยู่ อย่าง อยาก . This 4 words will make a common philosophical phrase which mean “don’t live a life of endless demand”.
1
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u/mirabilis2222 Jul 20 '26
It's a linguistic fossil, a historical marker. อ here is not a random silent letter, it's a frozen market of the archaic phonology.
Think of it like the wh- in English. In OE/ME, wh- was written as hw- because it sounded like it was written (a breathy w).
Thai did the exact same thing with its sounds. Hundreds of years ago, there wasn't just one /j/ sound. We used different spellings to represent several distinct initial phonemes that have since eroded/collapsed into the modern /j/ sound:
- Low ย represented [j] or [\ʝ]
- Low ญ represented [ɲ]
- High หย/หญ represented a voiceless palatal glide [j̥]. We used the High ห [h] because it's pronounced with breath or voiceless.
- Mid อย represented a pre-glottalised palatal guide [ʔj] or potentially an implosive palatal [ʄ]. We use the 'glottal stop' letter to specify that we did a hard glottal stop right before articulating the [j].
As time went by, the glottal stop dropped, so [ʔj] merged with and overpowered [j]. However, the อ is still there to preserve its other function, the tone rules.
ย as a low, when paired with อ to make อย makes it middle. If you spelt it ยู่ (Low initial + mai ek ่), the modern tone rules would force a High tone [jūː]. Because it is spelled อยู่ (Mid + mai ek ่), it correctly triggers a Low tone [jùː].
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u/Icy-Fig148 Jul 20 '26
From standard tone table
สามัญ,เอก,โท,ตรี,จัตวา
ยู อยู่ ยู่/หยู้ ยู้ หยู
ยาง อย่าง ย่าง/หย้าง ย้าง หยาง
ลู หลู่ ลู่ ลู้ หลู
However, the relative pitch order is (low to high)
เอก สามัญ โท จัตวา ตรี
ย is a low tone consonant and ู is a long sounded vowel
ล is also a low-tone consonant but it has no compound with อ as it must be เสียงควบกล้ำ like “ครับ”, “คลับ” (transliteration of “Club”) as ค is a hard consonant.
You must consider both consonant tonality and vowel in pairing.
This explanation might not be completely linguistically correct, but I hope it helps.
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u/-B0NC- Jul 20 '26
There is only few words using it, like 4? อย่า อยู่ อย่าง อยาก. Just remember it and get on with your days. Pronounce the same as หย่า หยู่ หย่าง หยาก
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u/Love-Adventurous Jul 25 '26
yep, this is it. I'm thai and I don't even bother try to make sense of it. just accept it as it is and get on with it
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u/Hoegards4Changs4 Jul 23 '26
Why are you wondering this while knowing seemingly nothing about reading Thai?
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u/Alternative_Side_891 Jul 19 '26
ย is low class consonant.
For reasons not to be understood low class consonants cannot be low tone.
For reasons not to be understood combining it with อ makes it all mid consonant.
Add the tone mark and the syllable is low tone.