(idiomatic) To refrain from talking, especially to remain silent about something that may be sensitive or secret.

(idiomatic) To watch and pay attention to, in case of misbehaviour or mishap.

To remember; to be mindful of or pay attention to.

To remain silent. / (idiomatic) To refrain from talking about something; to keep a secret.

(cricket, intransitive) To act as wicket-keeper.

(idiomatic, imperative) To keep something secret.

(intransitive) To retain one's faith. / (transitive) To continue to have confidence in someone or something, and to support them or it.

(idiomatic) To monitor; to keep track of; to watch.

(transitive) to keep something near one.

(intransitive) To continue functioning. / (transitive) To proceed; to make progress, physically or figuratively.