string attached

idiomatic

(idiomatic) A condition.

Japanese Meaning

条件が付いている（何らかの条件、附帯条件）

There was a string attached to his generous offer.

彼の寛大な申し出には条件が付いていた。

Sense（1）

(idiomatic) A condition.

I'll get you that new video game that you want so badly, but there's a string attached; you must also clean your room at least once a week.

strings attached

（ plural ）