Word: 臀部 (túnbù) 臀部 dictionary entry túnbù butt; buttocks Full dictionary entry for 臀部 Example sentences using 臀部 2 sentences, showing page 1 of 1. 他滑了一下，臀部着地。 Tā huále yíxià, túnbù zháodì. He slipped and landed on his butt. 坐太久，臀部会发麻。 Zuò tài jiǔ, túnbù huì fāmá. If you sit too long, your butt goes numb.