How to say “Zero” in Thai
ศูนย์
sǔun
“zero”
“Zero” in Thai is ศูนย์, written sǔun in the Latin alphabet.
Tone
ศูนย์ carries a rising tone — dips, then climbs like a question. Thai uses tone to tell words apart, so the pitch is part of the word, not an accent you can drop.
The shortest way in is an English intonation you already use. Say “Huh?” out loud — puzzled, because you genuinely did not catch that — then say ศูนย์ with that same shape.