Antonyms of adv excusably

1 sense of excusably

Sense 1
excusably, forgivably, pardonably -- (in an excusable manner or to an excusable degree; "he was excusably late")
       Antonym of inexcusably (Sense 1)
      => inexcusably, unpardonably, unforgivably -- (in an unpardonable manner or to an unpardonable degree; "he was inexcusably cruel to his wife")

Synonyms of adv excusably

1 sense of excusably

Sense 1
excusably, forgivably, pardonably -- (in an excusable manner or to an excusable degree; "he was excusably late")