2 Old HSK word(s): ☊失眠 ** C ☊睡眠 ** C
安眠* * 长眠* * 催眠* * 冬眠* * 眠* * 休眠* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

休 rest, stop / retire / do not!
眠 close eyes, sleep / hibernate

Hsk Characters: 眠 *
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual
眠 7720 + 眠 + + close eyes, sleep / hibernate 目 民 Eye 民 (VOLK) mian2 +

Korean:

眠 + 眠 잘 면 (자다: to sleep) or 잠잘 면 (to sleep)
1 NHSK word(s): 失眠* 5 shi1 mian2(suffer from) insomnia
KOREAN6000 word(s):
1 KOREAN 2500 New HSK words):
失眠 + shīmián 잠을 이루지 못하다. 불면증에 걸리다. jam-eul iluji moshada. bulmyeonjeung-e geollida.
0 KOREAN Sentence(s):