What is the past tense of retake?

The past tense of retake is re-took, and the past participle is re-taken.

Retake is an irregular (strong) verb: the vowel changes instead of adding -ed.

All forms of retake

as a noun

base: retake
plural: retakes

as a verb

base: retake
past tense: re-took
past participle: re-taken
present participle: re-taking
third-person singular: re-takes