Meaning of yì:
易
surname Yi; abbr. for 易經|易经[Yi4jing1], the Book of Changes
Yì lǎoshī shì wǒ zuì xǐhuān de lǎoshī.
易老师是我最喜欢的老师。
Mr. Yi is my favorite teacher.
Zhè běn shū shì guānyú 《Yìjīng》 de.
这本书是关于《易经》的。
This book is about the Book of Changes.
easy; amiable
Zhè dào tí hěn yì.
这道题很易。
This question is very easy.
Tā xìnggé fēicháng yì xiāngchǔ.
他性格非常易相处。
He has a very amiable personality.
to change; to exchange
Shíjiān liúshì, yīqiè dōu zài yìbiàn.
时间流逝,一切都在易变。
As time flows, everything is subject to change.
Tāmen juédìng yòng shū lái yì shū.
他们决定用书来易书。
They decided to exchange books with each other.
prefix corresponding to the English adjective suffix "-able" or "-ible"
Zhè zhǒng shuǐguǒ fēicháng róngyì xiāohuà.
这种水果非常容易消化。
This type of fruit is very easy to digest.