A word considered taboo and vulgar or offensive.

(idiomatic) To quit or cease completely, or to promise to quit, as a bad habit.

(transitive, formal) To take an oath on someone or something.

(transitive) To obtain (a warrant or the like) by swearing to facts.

(Northern England) I promise; no lie.

To promise that something is (not) true. / To promise; swear; give one's word.

A jar into which anybody who utters a profanity is obliged to drop some money.

(informal) a money box, used to collect a nominal fine from people who use foul language, especially in a workplace.

(colloquial) To insist strongly (that something is true).

(now historical) To swear legally (against someone) that one is in fear of physical violence from a person, in order that they be put under bond to keep the peace.