土牛木马 tǔniúmùmǎ something useless Origin Definitions Defs Strokes Stroke Words Sentences Sents 土 tǔ noun soil soil; earth; dirt; clay牛 niú noun ox ox; cow; bull; cattle; any of various bovine animals木 mù noun wood (bound form) wood; timber; lumber马 馬 mǎ noun horse horse; any animal of the horse family; large mammal used for riding, pulling carts, or farm work