(idiomatic) To attempt a skill, craft, trade, or action, possibly for the first time.

(transitive, idiomatic) Have a controlling influence over.

A mirror reflecting images on one side and transparent on the other, often used by the police during interrogations.

(travel) A ticket granting permission to travel to a place but not return. / (figuratively) A course of action from which there is no return.

(colloquial) To become enthusiastically involved in.

when walking or running, to reach a full or comfortable pace / (figuratively) to reach a full level of efficiency, competence, comfort, etc.; to get going

Used other than figuratively or idiomatically: see hold, one's, breath. To keep air in one's lungs, pausing noticeably before exhaling after previously inhaling.

(figuratively) To regret or retract what one has said.

to circle one's thumbs around one another, usually with the fingers interlaced, usually done idly while waiting or bored

(idiomatic) To decide differently than one had decided before.