7 Old HSK word(s): ☊减 ** B ☊减轻 ** B ☊减少 ** B ☊减产 ** D ☊减低 ** D ☊减弱 ** D ☊削减 ** D
裁减* * 删减* * 缩减* * 增减* * 酌减* *

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

酌 serve wine / feast / deliberate
减 decrease, subtract, diminish

Hsk Characters: 减 *
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual
减 51CF + 減 + + decrease, subtract, diminish 冫 咸 Ice 咸 (SALZIG) jian3 +

Korean:

減 + 减 줄어들 감 (for the size to become smaller) or 덜 감 (덜다: to do less, subtract, mitigate, remove)
2 NHSK word(s): 减肥* 4 jian3 fei2to lose weight 减少* 4 jian3 shao3to lessen/ to decrease/ to reduce/ to lower
KOREAN6000 word(s):
2 KOREAN 2500 New HSK words):
减肥 + jiǎnféi 살을 빼다. 감량하다. 체중을 줄이다. sal-eul ppaeda. gamlyanghada. chejung-eul jul-ida.
减少 + jiǎnshǎo 감소하다. 줄다. 줄이다. 축소하다. 삭감하다. gamsohada. julda. jul-ida. chugsohada. saggamhada.
2 KOREAN Sentence(s):
我必须减肥。 + 저는 살을 빼야 해요. jeoneun sa-reul ppaeya haeyo.
我不能吃它（蛋糕），因为我必须减肥。 + 저는 살을 빼야 해서 안 먹어요. jeoneun sa-reul ppaeya haeseo an meo-geoyo.