Jump out from a hiding place and surprise (someone).

synonyms: leap out, rush out, sally out.

Roget 66: begin, start, commence; conceive, open, dawn, set in, take its rise, enter upon, enter; set out etc. (depart) 293; embark in; incept^†.    initiate, launch, inaugurate.    inchoate, rise, arise, originate.    usher in; lead off, lead the way; take the lead, take the initiative; head; stand at the head, stand first, stand for; lay the foundations etc. (prepare) 673; found etc. (cause) 153; set up, set on foot, agoing^†, set abroach^†, set the ball in motion; apply the match to a train; broach; open up, open the door to.    get underway, set about, get to work, set to work, set to; make a beginning, make a start.    handsel; take the first step, lay the first stone, cut the first turf; break ground, break the ice, break cover; pass the Rubicon, cross the Rubicon; open fire, open the ball; ventilate, air; undertake etc. 676.    come into existence, come into the world; make one's debut, take birth; burst forth, break out; spring up, spring forth, crop up, pop up, appear, materialize.    begin at the beginning, begin ab ovo [Lat.].    begin again, begin de novo; start afresh, make a fresh start, take it from the top, shuffle the cards, reshuffle the cards, resume, recommence.    ... show more

Roget 194: become larger etc. (large) etc. 192; expand, widen, enlarge, extend, grow, increase, incrassate^†, swell, gather; fill out; deploy, take open order, dilate, stretch, distend, spread; mantle, wax; grow up, spring up; bud, bourgeon [Fr.], shoot, sprout, germinate, put forth, vegetate, pullulate, open, burst forth; gain flesh, gather flesh; outgrow; spread like wildfire, overrun.    be larger than; surpass etc. (be superior) 33.    render larger etc. (large) etc. 192; expand, spread, extend, aggrandize, distend, develop, amplify, spread out, widen, magnify, rarefy, inflate, puff, blow up, stuff, pad, cram; exaggerate; fatten.    ... show more

Roget 446: be become visible etc. adj.; appear, open to the view; meet the eye, catch the eye; basset; present itself, show manifest itself, produce itself, discover itself, reveal itself, expose itself, betray itself; stand forth, stand out; materialize; show; arise; peep out, peer out, crop out; start up, spring up, show up, turn up, crop up; glimmer, loom; glare; burst forth; burst upon the view, burst upon the sight; heave in sight; come in sight, come into view, come out, come forth, come forward; see the light of day; break through the clouds; make its appearance, show its face, appear to one's eyes, come upon the stage, float before the eyes, speak for itself etc. (manifest) 525; attract the attention etc. 457; reappear; live in a glass house.    expose to view etc. 525.    ... show more

Be unleashed; emerge with violence or noise.

synonyms: break loose, explode.

Come into or as if into flower.

synonym: effloresce.