to stand ready and have bow drawn / to wait for the perfect opportunity; to wait for the right time; to bide one's time

(idiomatic) to have something on (someone)

to support; to assist or approve

to seize the power of a country by winning a civil war / to become eminent (in one's area of expertise)

(idiomatic) to break off relation with, to part from

(idiomatic) to lose one's temper, to fly off the handle

(figuratively) to be absorbed in

(idiomatic) to look for a fight; lit. to sell a fight

(idiomatic) to take on a fight; lit. to buy a fight

Watch yourself, be careful, literally, "keep your health" / take care (used when parting)