Meaning of tún:
tún
臀
Noun
buttocks; hips; rump; old variant of 臀[tun2]
Tā cānjiāle yī gè tún bù duànliàn kèchéng.
他参加了一个臀部锻炼课程。
He enrolled in a buttocks workout class.
Tā měitiān duànliàn, yǐ zēngqiáng tā de tún bù jīròu.
他每天锻炼，以增强他的臀部肌肉。
He exercises every day to strengthen his glute muscles.
