homing device

homing missile

to fumble for words, to grasp for words, to be at a loss for words

(Belgium, informal) to give (someone) a hard time, to make (someone's) life a misery, to torment [+ à (someone)]

(idiomatic) to have it coming

to fetch, to go and get / to pick up (someone) / Used other than figuratively or idiomatically: see aller, chercher.

to split hairs