The noun 港口 (gǎngkǒu) means "port" or "harbor." It refers to a place where ships load and unload goods or passengers. It is commonly used in contexts related to trade, shipping, and transportation.
这个港口每天都有大量的货船进出。
Zhège gǎngkǒu měitiān dōu yǒu dàliàng de huòchuán jìnchū.
A large number of cargo ships enter and leave this port every day.
他们计划在南部建设一座新的港口。
Tāmen jìhuà zài nánbù jiànshè yī zuò xīn de gǎngkǒu.
They plan to build a new port in the south.
港口附近的海鲜市场特别热闹。
Gǎngkǒu fùjìn de hǎixiān shìchǎng tèbié rènao.
The seafood market near the port is especially lively.