Eng: Cavity...

腔

Accent, Cavity, Hollow, Manner, Tune

膛

Cavity, Chest, Hollow

穴

Cave, Cavity, Hole

竅

Aperture, Cavity, Crux, Gist, Hole, Key Point

窿

Cavity, Hole, Mine shaft

洞

Cave, Cavern, Cavity, Hole, Pierce, See through, Understand, Zero

坳

Cavity, Depression, Hollow

洞洞

Cavities, Cavity, Hole, Holes