(idiomatic) To be a crucial or deciding factor; to have a very significant effect (often a positive one).

To help oneself liberally to food at table.

(idiomatic, Ireland) To embarrass oneself or others in public.

(dated) To greet a person with a respectful bow or curtsey.

(formal) To meet someone; to be introduced.

To initiate something.

(idioms) To behave in an irritating way.

(transitive) To do (something) in a way that is unnecessarily complicated, elaborate, or public.

(US, informal) To act very quickly or energetically.

(archaic) To conciliate; to flatter.