지켜야지

should keep, should observe, should protect

→ 지키다
verb · informal Rare #18,673
should keep, should observe, should protect Often expresses a resolve or reminder to oneself; the subject is understood from context.
KO: 약속을 지켜야지.
EN: I should keep my promise.
Conjugation of 지키다
Necessitative
지켜야지켜야지

그럼, 법을 지켜야지

Then we have to obey the law.

— The Roundup (2022)

약속은 지켜야지

You have to keep your promises.

— 산딸기 (1957)