窠

Definitions

 * 1) bird's nest in cave; nest
 * 2)  simple dwelling
 * 3)  empty space; pit; hole

Kanji

 * 1) nest
 * 2) hole
 * 3) indentation
 * 4) den

Hanja

 * 1) nest
 * 2) hole
 * 3) indentation
 * 4) den