海沟

Traditional form:

海溝

Pinyin (reading):

hǎigōu

Definitions:

• marine trench

Characters:

• 海 - sea, ocean; maritime
• 沟 - ditch, drain, gutter, narrow waterway

Traditional characters:

• 海 - sea, ocean; maritime
• 溝 - ditch, drain, gutter, narrow waterway