Synonyms of impugnable

2 Syllables

touchy, dubious, hairy, open, chancy, loaded, rugged, shaky, iffy, doubtful, rocky, risky, ticklish, dicey

3 Syllables

hazardous, unstable, ambiguous, unsure, unsettled, contingent, dangerous, unsteady, slippery, unsafe, unhealthy, precarious, uncertain, perilous

4 Syllables

unreliable, dynamite, sensitive, borderline, delicate, equivocal, problematic, insecure

5 Syllables

indecisive