Synonyms to on thin ice

chancy, accidental, adventitious, adventurous, agnostic, aleatoric, aleatory, ambiguous, amorphous, blobby, blurred, blurry, broad, capricious, casual, causeless, chance, changeable, chaotic, confused, contingent, destinal, dicey, disordered, doubting, equivocal, erratic, fatal, fatidic, fickle, fluctuant, fluky, foggy, fortuitous, full of risk, fuzzy, general, hairy, hazardous, hazy, hesitant, hesitating, hit-or-miss, iffy, ill-defined, imprecise, inaccurate, incalculable, inchoate, incidental, incoherent, indecisive, indefinable, indefinite, indemonstrable, indeterminable, indeterminate, indistinct, inexact, irresolute, jeopardous, lax, loose, nonspecific, obscure, orderless, perilous, polysemous, precarious, random, riskful, risky, shadowed forth, shadowy, shapeless, skeptical, speculative, stochastic, sweeping, ticklish, touch-and-go, touchy, treacherous, tricky, unaccountable, uncaused, uncertain, unclear, unconfirmable, unconvinced, undefined, undestined, undetermined, undivinable, unexpected, unforeseeable, unforeseen, unhealthy, unlooked-for, unpersuaded, unplain, unpredictable, unprovable