弱み

weakness, vulnerability

弱 weak, not strong + み -ness; quality or state
noun Rare #44,333
weakness, vulnerability Often used in the expression 弱みに付け込む, “to take advantage of someone’s weakness.”
JA: 誰にでも弱みはある。
EN: Everyone has a weakness.

弱みがあった

I had a weakness.

— ア・フュー・グッドメン (1992)

彼の弱みに付け込むのはやめなさい。

Stop taking advantage of his weakness.

ジョンはビルの弱みに付け込んだ。

John took advantage of Bill's weakness.

人の弱みに付け込むことはやめろよな。

Stop taking advantage of people's weaknesses.