灰 On the HSK 7-9 vocabulary list, at CEFR level C2. huī ㄏㄨㄟ ash dust lime gray discouraged dejected Words with 灰 Starting with 灰 灰色 Where 灰 is used Example sentences and grammar articles using 灰 Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT