อะ

said when giving or handing something to someone, or used to express agreement, allowance, or approval: here you go; here you are; here it is; here they are; okay; etcwiktionary

used to express various feelings or emotions, depending on the manner of utterance: ah; uh; oh; etcwiktionary

(สระ~) the vowel /a/, represented by –ั–, –ะ, –รร, or –รร–(Thai)wiktionary

used at the end of an expression for emphasis(childish)wiktionary