(obsolete, slang) To mount sexually; to have an erection.

(idiomatic, of an event, thing, person) To emerge, come up; be about to happen; to approach or arrive on the scene; to present (itself or oneself).

Asks for permission to enter a room.

Of or pertaining to a hunter-gatherer culture that existed in northeastern Europe from around 4200 BC to around 2000 BC.

A type of boot designed to be worn by soldiers during actual combat or combat training

To worry about a future situation despite being as yet unable to act on it.

(idiomatic) To make significant progress.

Bad things or situations always come in groups or streaks, they never come in a single way.

(idiomatic) What you just said reminds me of something; Used to justify a change of subject or a kind of statement that needs some kind of license.

(thermodynamics) using multiple thermodynamic cycles so that the overall effect is greater than the sum of the parts