猿轡をかます[sarugutsuwawokamasu] to gag someone
猿轡[sarugutsuwa] (mouth) gag
金轡[kanagutsuwa] a (metal) bit

轡虫[kutsuwamushi] Mecopoda nipponensis (species of katydid)
轡銜[kutsuwa] bit (i.e. attached to a bridle)
轡屋[kutsuwaya] brothel

銜む[kukumu] to contain
銜える[kuwaeru] to hold in one's mouth
枚を銜む[baiwofukumu] (of a horse) to be gagged
轡銜[kutsuwa] bit (i.e. attached to a bridle)
銜えこむ[kuwaekomu] to hold fast deep in (one's mouth or other orifice, often used in a sexual context)

銜え箸[kuwaebashi] holding one's chopsticks in one's mouth (a breach of etiquette)
馬銜[hami] bit mouthpiece
横銜え[yokoguwae] holding horizontally in one's mouth
指を銜える[yubiwokuwaeru] to look on enviously while doing nothing