筋 On the HSK 7-9 vocabulary list, at CEFR level C2. jīn ㄐㄧㄣ muscle tendon veins visible under the skin sth resembling tendons or veins (e.g. fiber in a vegetable) 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