present participle of knuckle down

(intransitive, Britain, business) To become less by being sold. / (transitive, Britain, business) To reduce by selling.

(idiomatic) To betray a person; to conspire against someone for personal gain.

plural of sit-down

(idiomatic, transitive) To write. / (transitive) To fix; to establish; to ordain.

To approach someone in a very determined way.

(photography) To decrease the aperture of a photographic lens, moving from an f/stop represented by a lower number to an f/stop represented by a higher number.

(intransitive, idiomatic) To decrease in intensity of anger, agitation, or excitement.

To perform gentle exercise at the end of a training session before cooling off.

(idiomatic) To make more specific.