Antonyms of adj impermissible

2 senses of impermissible

Sense 1
impermissible (vs. permissible) -- (not permitted; "impermissible behavior")

permissible (vs. impermissible), allowable -- (that may be permitted especially as according to rule; "permissible behavior in school"; "a permissible tax deduction")

Sense 2
impermissible -- (not allowable)

INDIRECT (VIA inadmissible) -> admissible -- (deserving to be admitted; "admissible evidence")

Similarity of adj impermissible

2 senses of impermissible

Sense 1
impermissible (vs. permissible) -- (not permitted; "impermissible behavior")
       => forbidden, out (predicate), prohibited, proscribed, taboo, tabu, verboten -- (excluded from use or mention; "forbidden fruit"; "in our house dancing and playing cards were out"; "a taboo subject")
       => unmentionable -- (unsuitable or forbidden as a topic of conversation; "unmentionable words")
       => untouchable -- (forbidden to the touch; "in most museums such articles are untouchable")
          Also See-> intolerable#1, unbearable#1, unendurable#1

Sense 2
impermissible -- (not allowable)
       => inadmissible (vs. admissible) -- (not deserving to be admitted; "inadmissible evidence")