'Sword' is purely Germanic with no outside relatives — its silent 'w' fossils the Old English pronunciation.
A weapon with a long metal blade and a hilt with a hand guard, used for thrusting or striking.
From Old English 'sweord' (sword, blade), from Proto-Germanic *swerdą (sword), of disputed further origin. One leading proposal connects it to PIE *swer- (to wound, to pierce), from which also Old High German 'swëran' (to fester, to ache) — suggesting the weapon named by its capacity to cause pain. A second hypothesis links it to PIE *swerH- (to cut