Meaning

noun someone who is incapacitated by a chronic illness or injury

verb force to retire, remove from active duty, as of firemen

verb injure permanently

originEtymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Proto-Indo-European *h₂welh₁- Proto-Indo-European *h₂wl̥h₁éh₁yeti Proto-Italic *walēō Latin valeō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin validus Latin invalidusbor. Middle French invalidebor. English invalid Borrowed from Middle French invalide, from Latin invalidus (“infirm,…

Etymology from Wiktionary, CC BY-SA 3.0