5 Old HSK word(s): ☊灰 ** B ☊灰 ** C ☊灰尘 ** C ☊灰心 ** C ☊石灰 ** D
骨灰* * 火山灰* * 煤灰* * 炮灰* * 碰一鼻子灰* * 万念俱灰* * 洋灰* * 烟灰* * 油灰* *

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

油 oil, fat, grease, lard / paints
灰 ashes / dust / lime, mortar

Hsk Characters: 灰 *
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual
灰 7070 + 灰 + + ashes / dust / lime, mortar 火 灰 Fire 灰 (ASCHE) hui1 +

Korean:

灰 + 灰 재 회 (ashes)
3 NHSK word(s): 灰* 5 hui1ash/ dust/ lime/ gray/ discouraged/ dejected 灰尘* 5 hui1 chen2dust 灰心* 5 hui1 xin1lose heart/ be discouraged
KOREAN6000 word(s):
3 KOREAN 2500 New HSK words):
灰 + huī 재. jae.
灰尘 + huīchén 먼지. meonji.
灰心 + huīxīn 낙담하다. 낙심하다. 의기소침하다. nagdamhada. nagsimhada. uigisochimhada.
4 KOREAN Sentence(s):
云是灰色的。 + 구름은 회색이에요. kureumeun hwehsaegieyo.
云是什么颜色的? 灰色。 + 구름은 무슨 색이에요? 회색. kureumeun museun saegieyo? hwehsaek.
您有烟灰缸吗? + 재떨이 있어요? jaetteo-ri isseoyo?
您有烟灰缸吗？ + 재떨이 있으세요? jaetteo-ri isseuseyo?