Antonyms of adj imperfectible

1 sense of imperfectible

Sense 1
imperfectible -- (capable of being made imperfect)

INDIRECT (VIA imperfect) -> perfect -- (being complete of its kind and without defect or blemish; "a perfect circle"; "a perfect reproduction"; "perfect happiness"; "perfect manners"; "a perfect specimen"; "a perfect day")

Similarity of adj imperfectible

1 sense of imperfectible

Sense 1
imperfectible -- (capable of being made imperfect)
       => imperfect (vs. perfect) -- (not perfect; defective or inadequate; "had only an imperfect understanding of his responsibilities"; "imperfect mortals"; "drainage here is imperfect")