Come open suddenly.

Roget 260: open, ope^†, gape, yawn, bilge; fly open.    perforate, pierce, empierce^†, tap, bore, drill; mine etc. (scoop out) 252; tunnel; transpierce^†, transfix; enfilade, impale, spike, spear, gore, spit, stab, pink, puncture, lance, stick, prick, riddle, punch; stave in.    cut a passage through; make way for, make room for.    uncover, unclose, unrip^†; lay open, cut open, rip open, throw open, pop open, blow open, pry open, tear open, pull open.    ... show more