Meaning of yǐ:
yǐ
乙
Numeral
second of the ten Heavenly Stems 十天干[shi2 tian1 gan1]; second in order; letter "B" or Roman "II" in list "A, B, C", or "I, II, III" etc
Noun
second party (in legal contract, usually 乙方[yi3 fang1], as opposed to 甲方[jia3 fang1]); radical in Chinese characters (Kangxi radical 5); ancient Chinese compass point: 105°; turning stroke (in Chinese characters), aka 折[zhe2]
Adjective
ethyl; bent; winding