This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. doubtful or disputed

adj. dubious or ambiguous

Same as problematic.

adj. open to doubt or debate

adj. making great mental demands; hard to comprehend or solve or believe

"Especially problematical is the fact that what is considered fraudulent is mainly"

questionable    difficult    hard   

uncertain    problematic   

fanatical    grammatical    mathematical    sabbatical    viatical   

disputable    undecided    unfavourable    conjectural    paradoxical    unsatisfactory    questionable    synthetical    problematic    indecisive