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Noun referring to a hard outer covering, such as on a turtle or crab. Used in biological contexts or compound words.
Theme

At a beach cleanup event, User and their friend Kaito are picking up trash and discussing marine life. Kaito finds a seashell and asks about its type.

こう

shell

Nature & EnvironmentAnimals

Memory Hook

Imagine a turtle's shell as a 'carapace' — '甲' (kō) sounds like 'carapace' and looks like a hard, protective covering.

Cultural Note

In Japanese, 『甲』 (kō) often refers to the hard shells of animals like turtles or crustaceans. It's also used in compound words like 『甲殻類』 (kōkakurui, 'crustaceans') to describe creatures with exoskeletons.

Forms

Base: 甲Noun referring to a hard outer covering, such as on a turtle or crab. Used in biological contexts or compound words.