How to say “Good at” in Thai
เก่ง
gèng
“good at / skilled”
“Good at” in Thai is เก่ง, written gèng in the Latin alphabet.
Tone
เก่ง carries a low tone — below your resting pitch, and it stays there. 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 “Don’t.” out loud — quiet and stern, the warning you give without raising your voice — then say เก่ง with that same shape.