Antonyms of adj maintainable

1 sense of maintainable

Sense 1
maintainable -- (capable of being maintained)

INDIRECT (VIA reparable) -> irreparable -- (impossible to repair, rectify, or amend; "irreparable harm"; "an irreparable mistake"; "irreparable damages")

Similarity of adj maintainable

1 sense of maintainable

Sense 1
maintainable -- (capable of being maintained)
       => reparable (vs. irreparable), rectifiable -- (capable of being repaired or rectified; "reparable damage to the car"; "rectifiable wrongs")