tònɡ
管子是通的
guǎnzi shì tōng de
The pipe is clear/unobstructed.
山洞快要打通了丨比喻用法这个主意行得通。
shāndòng kuàiyào dǎtōng le | bǐyù yòngfǎ zhège zhǔyi xíng de tōng.
The tunnel is almost broken through. | Figurative usage: This idea is workable/feasible.
用通条通炉子。
yòng tōngtiáo tōng lúzi.
Use a poker/rod to clear the stove.