weapon (n.) Look up weapon at Dictionary.com
Old English wæpen "instrument of fighting and defense," from Proto-Germanic *wæpnan (cf. Old Saxon wapan, Old Norse vapn, Danish vaaben, Old Frisian wepin, Middle Dutch wapen, Old High German waffen, German wafen (neuter), waffe (fem.)), from *webno-m, of unknown origin with no cognates outside Germanic.