D defs.my
Entry 2 senses Webster, 1913

Invulnerable

/ĭnˌ-vŭl'-nẽr-əb-əl/ · In·vul·ner·a·ble · IPA /ˌɪnvˈʌlnərəbəl/
01 a. Incapable of being wounded, or of receiving injury.
  1. 1.
    Incapable of being wounded, or of receiving injury.
    “Neither vainly hope To be invulnerable in those bright arms.” Milton.
  2. 2.
    Unanswerable; irrefutable; that can not be refuted or convinced; as, an invulnerable argument.