adjective
1.
Synonyms: uncertain 1, capricious, dicey, erratic, fluctuant, iffy, incalculable, unpredictable, whimsical
Related Word: hazardous, risky, speculative, unsound; precarious, ticklish, touchy, tricky
Idioms: hanging by a thread, on thin ice ( or slippery ground)
Contrasted words: safe, secure, sound, stable
2.
Synonyms: dangerous 1, hairy, hazardous, jeopardous, perilous, risky, treacherous, unhealthy, unsound, wicked