n. 25B6; noun
fasten the hem with a pin : TACK, safety pin, nail, staple, fastener.
a broken pin in the machine : BOLT, peg, rivet, dowel, screw.
they wore name pins : BADGE, brooch.
25B6; verb
she pinned the brooch to her dress : ATTACH, fasten, affix, fix, tack, clip; join, secure.
they pinned him to the ground : HOLD, press, hold fast, hold down; restrain, pinion, immobilize.
they pinned the crime on him : BLAME FOR, hold responsible for, attribute to, impute to, ascribe to; lay something at someone's door; informal stick on.
25A0; pin someone/something down
our troops can pin down the enemy : CONFINE, TRAP, hem in, corner, close in, shut in, hedge in, pen in, restrain, entangle, enmesh, immobilize.
she tried to pin him down to a plan : CONSTRAIN, make someone commit themselves, pressure, pressurize, tie down, nail down.
it evoked a memory but he couldn't pin it down : DEFINE, put one's finger on, put into words, express, name, specify, identify, pinpoint, place.