unfair
un- + fair
https://gyazo.com/97f22be81353da996fd65c7af452b76e
source: Isn't this a little bit unfair, I mean we have guns and they only have swords | Anime / Manga | Know Your Meme
adjective
not based on or behaving according to the principles of equality and justice:
【人に】不公平な, 偏った «to, on»
e.g. at times like these the legal system appears inhumane and unfair.
unkind, inconsiderate, or unreasonable:
不正な, 不当な, ずるい
e.g. you're unfair to criticize like that when she's never done you any harm.
not following the rules of a game or sport.
ORIGIN
Old English unfæger‘not beautiful’(see un-1, fair1).