(Colloquial) Used as an interrogative word meaning "what", particularly in the common phrase 干嘛 gàn​má.

Used at the end of a sentence to indicate that the truth of a statement is obvious or a matter of course

Used at the end of a sentence to make a request, suggestion, or command sound more encouraging or to soften a tone of persuasion

Used in the middle of a sentence to create a pause, often to highlight the preceding topic before continuing with a comment.

(bound form) Used in Buddhist transliterations, notably as the second syllable of the six-character mantra 唵嘛呢叭咪吽 ǎn​má​ní​bā​mī​hōng.

(Taiwan) Used at the end of a sentence to indicate a question