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

• Lexulous
• Wordscraper
• Wordosaur

adj. Unsuitable or improper.

adj. Not appropriate; not suitable for the situation, time, and/or place.

adj. Not instrument (to); not appropriate; unbecoming; unsuitable; not specially fitted; -- followed by to or for.

Not appropriate or pertinent; not proper; unsuitable: as, inappropriate remarks.

adj. not in keeping with what is correct or proper

adj. not suitable for a particular occasion etc

"Of course, the term "inappropriate" is subjective."

incongruous    wrong    unbefitting    improper   

inappropriately    inappropriateness   

unbecoming    unsuitable    out of line    unfit   

unfair    irrelevant    unsuitable    inadequate    inaccurate    untrue    objectionable    incongruous    unsatisfactory    harmful