1Being in a disadvantageous or unfavorable position or condition; the opposite of 有利 (advantageous).
初戦でけがをしたため、その後は不利な状況が続いた。
Because he was injured in the first match, he remained at a disadvantage afterwards.
交渉は我々にとって不利に進んでいるようだ。
The negotiations seem to be progressing to our disadvantage.
不利な条件だと知りながら、その契約にサインしてしまった。
Even knowing the terms were unfavorable, I ended up signing the contract.