(US and Canada, idiomatic) To prepare or fortify oneself for an activity requiring exertion.

(idiomatic, chiefly in the negative) Logic; common sense.

(usually childish) To inform on, to rat out; to tell a person in authority that someone else has done something wrong. / To cause visible strain to.

(chiefly US, idiomatic) On unfriendly terms; estranged.

(card games, slang) The nine of diamonds.

(idiomatic) Used in a result clause to express disbelief in a proposition expressed in a conditional clause.

(mathematics) A spiral that increases in distance from the point of origin at a constant rate.

A typical bad day.

A person of authority in the military who has not received a commission (a direct conveyance of authority from the sovereign government); as such they can have charge or control but not command in the most technical use of the word.

to discontinue something to put a stop to continued losses after facing that it is unlikely it will ever bear fruit