problematic Synonyms

complicated controversial difficult troublesome questionable complex uncertain doubtful debatable touchy knotty dubious hard problematical involved tricky tough burdensome sensitive baffling awkward rough speculative sticky rocky operose opposable painful paradoxical perplexed perplexing precarious prickly problem puzzling refutable risky stochastic stressful suspicious undecided borderline longshot unresolved chancy iffy unsure problematically unclassifiable undetermined