อา

Etymology 1
From a merger of and  (hence the form อาว). Cognate with 🇨🇬, 🇨🇬.

Noun

 * 1) younger sibling of one's father.
 * 2) a title or term of address for any elderly person, especially that of relative age to a younger brother or younger sister of one's father.

Etymology 2
.

Interjection

 * 1) ah.