gar (n.) Look up gar at Dictionary.com
"pike-like fish," 1765, American English, shortening of garfish (mid-15c.), from Old English gar "spear," from Proto-Germanic *gaizo- (cognates: Old Norse geirr, Old Saxon, Old High German ger, German Ger "spear"), from PIE *ghaiso- "stick, spear" (see goad (n.)).