leave no stone unturned
carry through, clear the decks, comb, consider every angle, exhaust every move, follow out, follow through, follow up, forearm, go all lengths, go all out, go for broke, go the limit, guard against, hedge, leave nothing undone, leave out nothing, look all over, look everywhere, make every effort, make sure, make sure against, not relax, not rest, overlook no possibility, overlook nothing, play safe, prepare for, provide a hedge, provide against, provide for, rake, ransack, reef down, rifle, rummage, scour, search high heaven, see it through, see out, shake, shake down, shorten sail, spare no effort, spare no pains, take measures, take precautions, take steps, toss, turn inside out, turn upside down
leave no stone unturned
exert oneself, exert one's energies, tax one's energies, use exertion, labor, work, toil, moil, sweat, fag, drudge, slave, drag a lengthened chain, wade through, strive, stretch a long arm, pull, tug, ply, ply the oar, tug at the oar, do the work, take the laboring oar bestir oneself (be active), take trouble, trouble oneself, work hard, rough it, put forth one's strength, put forth a strong arm, fall to work, bend the bow, buckle to, set one's shoulder to the wheel, work like a horse, work like a cart horse, work like a galley slave, work like a coal heaver, labor day and night, work day and night, redouble one's efforts, do double duty, work double hours, work double tides, sit up, burn the candle at both ends, stick to, work one's way, fight one's way, lay about one, hammer at, take pains, do one's best, do one's level best, do one's utmost, give one hundred percent, do the best one can, do all one can, do all in one's power, do as much as in one lies, do what lies in one's power, use one's best endeavor, use one's utmost endeavor, try one's best, try one's utmost, play one's best card, put one's best leg foremost, put one's right leg foremost, have one's whole soul in his work, put all one's strength into, strain every nerve, spare no efforts, spare no pains, go all lengths, go through fire and water, move heaven and earth, leave no stone unturned
make inquiry, inquire, ask, seek, search, look for, look about for, look out for, scan, reconnoiter, explore, sound, rummage, ransack, pry, peer, look round, look over, go over, look through, go through, spy, overhaul, ask about, inquire about, scratch the head, slap the forehead, look into every hole and corner, peer into every hole and corner, pry into every hole and corner, nose, trace up, search out, hunt down, hunt out, fish out, ferret out, unearth, leave no stone unturned
, seek a clue, seek a clew, hunt, track, trail, mouse, dodge, trace, follow the trail, follow the scent, pursue, beat up one's quarters, fish for, feel for, investigate, take up an inquiry, institute an inquiry, pursue an inquiry, follow up an inquiry, conduct an inquiry, carry on an inquiry, carry out an inquiry, prosecute an inquiry, look at, look into, preexamine, discuss, canvass, agitate, examine, study, consider, calculate, dip into, dive into, delve into, go deep into, make sure of, probe, sound, fathom, probe to the bottom, probe to the quick, scrutinize, analyze, anatomize, dissect, parse, resolve, sift, winnow, view in all its phases, try in all its phases, thresh out, bring in question, bring into question, subject to examination, put to the proof, audit, tax, pass in review, take into consideration, take counsel, question, demand, put the question, pop the question, propose the question, propound the question, moot the question, start the question, raise the question, stir the question, suggest the question, put forth the question, ventilate the question, grapple with the question, go into a question, question, put to the question, interrogate, pump, subject to interrogation, subject to examination, cross-question, cross-examine, press for an answer, give the third degree, put to the inquisition, dodge, catechize, require an answer, pick the brains of, suck the brains of, feel the pulse, get the lay of the land, see how the wind is blowing, put one's ear to the ground, be in question, undergo examination.