(auxiliary, defective) To know how to.
(auxiliary, defective) To be able to.
(auxiliary, defective, informal, modal) May; to be permitted or enabled to.
(auxiliary, defective, modal) To have the potential to; to be possible for (someone or something) to.
(auxiliary, defective, informal, modal) Used to form requests, typically polite.
(obsolete, transitive) To know.
(India, nonstandard, proscribed) To be (followed by a word like able, possible, allowed). third-person singular simple present indicative of can
(Manglish, Singlish, auxiliary, intransitive) To be able to or know how to (do something); an accompanying verb is not required if it is already inferable from context.
(Manglish, Singlish, intransitive) To be fine or acceptable; to be possible; (with liao or already) to be enough. Often used in conjunction with a variety of clause-final particles, e.g., lah, meh or one, to express different attitudes towards the subject matter.

OK(?); used at the end of a question when seeking approval or acknowledgment.