憋
biē
to choke
to stifle; to restrain; to hold back; to hold in (urine); to hold (one's breath)
他憋住气，慢慢地潜入水里。
tā biē zhù qì, màn màn de qián rù shuǐ lǐ。
he held his breath and slowly dived into the water.
她把话憋在心里，一直没有说出来。
tā bǎ huà biē zài xīn lǐ, yī zhí méi yǒu shuō chū lái。
she kept the words bottled up inside her heart and never said them out.