0 used in questions etc when asking someone to point out, state etc one or more persons, things etc -- อะไร
1 (also adverb) used in exclamations of surprise, anger etc -- อย่างไร
2 the thing(s) that -- สิ่งไหน
3 (also relative adjective) any (things or amount) that; whatever -- อะไรก็ตาม