N. danger, peril, insecurity, jeopardy, risk, hazard, venture, precariousness, slipperiness, instability, defenselessness &c

V. be in danger, be exposed to danger, run into danger, incur danger, encounter danger, run a risk, lay oneself open to, lean on a broken reed, trust to a broken reed, feel the ground sliding from under one, have to run for it, have the chances against one, have the odds against one, face long odds, be in deep trouble, be between a rock and a hard place, hang by a thread, totter, sleep on a volcano, stand on a volcano, sit on a barrel of gunpowder, live in a glass house, bring in danger, place in danger, put in danger, place in jeopardy, put in jeopardy, endanger, expose to danger, imperil, jeopard, jeopardize, compromise, sail too near the wind, adventure, risk, hazard, venture, stake, set at hazard, run the gauntlet, engage in a forlorn hope, threaten danger, run one hard, lay a trap for

Adj. in danger, exposure, endangered, vulnerability, fraught with danger, vulnerable point, dangerous, heel of achilles, hazardous, forlorn hope, perilous, leap in the dark, parlous, road to ruin, periculous|, faciles descensus averni, unsafe, hairbreadth escape, unprotected &c. (safe, protect ), cause for alarm, insecure, source of danger, untrustworthy, rock ahead, built upon sand, breakers ahead, on a sandy basis, storm brewing, wildcat, clouds in the horizon, defenseless, clouds gathering, fenceless, warning, guardless, alarm, harborless, apprehension, unshielded, vulnerable, expugnable, exposed, open to, aux abois, at bay, on the wrong side of the wall, on a lee shore, on the rocks, at stake, in question, precarious, critical, ticklish, slippery, slippy, hanging by a thread, with a halter round one's neck, between the hammer and the anvil, between scylla and charybdis, between a rock and a hard place, between the devil and the deep blue sea, between two fires, on the edge of a precipice, on the brink of a precipice, on the verge of a precipice, on the edge of a volcano, in the lion's den, on slippery ground, under fire, not out of the wood, unwarned, unadmonished, unadvised, unprepared, off one's guard, tottering, unstable, unsteady, shaky, top-heavy, tumbledown, ramshackle, crumbling, waterlogged, helpless, guideless, in a bad way, reduced to the last extremity, at the last extremity, trembling in the balance, nodding to its fall, threatening, ominous, illomened, alarming, explosive, adventurous, (bold) 861

Phr. incidit in scyllam qui vult vitare charybdim, nam tua res agitur paries dum proximus ardet