D defs.my
Entry 1 sense Webster, 1913

Inexcusable

/ĭnˌ-ĭk-skyo͞oz'-əb-əl/ · In·ex·cus·a·ble · IPA /ˌɪnɪkskjˈuːzəbəl/
01 a. Not excusable; not admitting excuse or justification; as, inexcusable folly.
  1. 1.
    Not excusable; not admitting excuse or justification; as, inexcusable folly.
    “Therefore thou art inexcusable, O man, whosoever thou art that judgest; for wherein thou judgest another, thou condemnest thyself; for thou that judgest doest the same things.” — Rom. ii. 1.