Nouncavity; hollow; cave; cavern · hollow

Nounlimestone cave; limestone cavern

Noun, Na-adjective (keiyodoshi)cavity; hollow; void · hollow (voice, smile, etc.); blank (eyes, look, etc.); vacant (expression, stare, etc.); empty (words, heart, etc.)

Nounhollow; cavity; hole

Nounsinus; cavity; antrum · neighborhood (administrative division in North Korea)