鬆 Simplified: 松 On the HSK 4 vocabulary list, at CEFR level B2. sōng ㄙㄨㄥ loose to loosen to relax floss (dry, fluffy food product made from shredded, seasoned meat or fish, used as a topping or filling) 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