Problematic

Adjective
problematic


 * 1) posing a problem; difficult to overcome or solve
 * 2) debatable; open to doubt
 * 3) unresolved or dubious
 * 4) doubtful or uncertain in its outcome

Noun

 * 1)  A problem or difficulty in a particular field of study

Thesaurus
a bit thick, a bit thin, absurd, ambiguous, arguable, at issue, baffling, bewildering, beyond belief, bothering, confounding, confusing, confutable, conjectural, contestable, controversial, controvertible, debatable, deniable, difficult, discomposing, disconcerting, dismaying, disputable, disputed, distracting, disturbing, doubtable, doubted, doubtful, dubious, dubitable, embarrassing, enigmatic, hairy, hard of belief, hard to believe, iffy, implausible, in dispute, in doubt, in dubio, in question, inconceivable, incredible, indecisive, intricate, mistakable, moot, mysterious, mystifying, not deserving belief, open, open to doubt, open to question, open to suspicion, passing belief, perplexing, perturbing, precarious, preposterous, problematical, puzzling, questionable, questioned, refutable, ridiculous, sensitive, speculative, staggering belief, suppositional, suspect, suspicious, tall, thick, thin, touchy, tricky, unbelievable, uncertain, unconvincing, undecided, unearthly, ungodly, unimaginable, unsettled, unthinkable, unworthy of belief, upsetting