Synonym of nourish a viper in one's bosom.

(idiomatic) to do acts of kindness that will be met with ingratitude and will cause one harm in the end

(vulgar, slang) Of a man: to have sexual intercourse.

Proceed without considering other possibilities. / To depart.

To stop dealing with; to switch to another business for one's dealings.

(idiomatic) Of an animal: to cost more to feed than it is worth.

(figuratively) To try a large number and variety of options.

(idiomatic) To suffer relatively minor, adversive, and unexpected harm.

To be independent; not to rely on others.

(idiomatic) To be angry or defensive.