leader of a large group · decorative black flagpole tassel made from the hair of a yak's tail, horse's tail, ox tail, etc., or from hemp · puffbird (Bucconidae)
köken: 大(おお) (ō-, “large”) + 頭(かしら) (kashira, “head”). The kashira changes to gashira as an instance of rendaku (連濁).