adj.
Pronunciation: ˌ i-nik- ' skyü-z ə -b ə l
Function: adjective
Etymology: Middle English, from Latin inexcusabilis, from in- + excusabilis excusable
Date: 15th century
: impossible to excuse or justify < inexcusable rudeness>
– in · ex · cus · able · ness noun
– in · ex · cus · ably \ -bl ē \ adverb