Problematic
Part of speech: adjective
Definition: posing a problem; difficult to overcome or solve debatable; open to doubt unresolved or dubious doubtful or uncertain in its outcome
Part of speech: noun
Definition: A problem or difficulty in a particular field of study
Example sentence: Simple black-and-white thinking or action is always going to be problematic.
Problematical
Part of speech: adjective
Definition: doubtful or disputeddubious or ambiguous