chén
石沉大海丨比喻用法星沉月落，旭日东升。
Shí chén dà hǎi | bǐyù yòngfǎ xīng chén yuè luò, xùrì dōng shēng.
Like a stone sinking into the sea | Figurative usage: stars sink and moon sets, the rising sun ascends in the east.
地基下沉。
Dìjī xiàchén.
The foundation is sinking.
沉下心来
Chén xià xīn lái.
Calm down and focus.