JMdict: 1201360

海溝 【かいこう】

  1. [n] oceanic trench; deep-sea trench; deep
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
海 Sea, Ocean カイ うみ
溝 Gutter, Ditch, Sewer, Drain, 10**32 コウ みぞ