衰减 Save Sign in to save words Traditional (Taiwan): 衰減 On the HSK 7-9 vocabulary list, at CEFR level C2. shuāijiǎn ㄕㄨㄞ ㄐㄧㄢˇ to weaken to attenuate Character by character 衰(shuāi)decay 减(jiǎn)lower A Chinese word or character, or English Search 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