He used his mouth to say it 4 times already! If he says it AGAIN, I swear I'll stomp that ass.
|( と ) い＊う||
ANY word - unlike the related term 単語（たんご）、 言葉 can refer to compound words, or onomonopoeia. Also 言葉 can mean "way of speaking." There are expressions like "watch what you say!" that use 言葉 this way: 言葉使い が丁寧 (her way of speaking is very polite!) or 言葉大切につかいましょう （let's be careful how we speak!)
we say "He speaks broken English".Japanese say, "He speaks katakoto nihongo."