昨 zuó

: yesterday

Kun Reading
none applicable

On Reading

さく saku

prefix
: last (year); yesterday

ゆう yuu

 Usage:

昨天 zuo2tian1: yesterday
昨日 zuo2ri4: yesterday
[きのう kinou OR さくじつ sakujitsu]
昨晚 zuo2wan3: yesterday evening; last night
[昨晩 | さくばん sakuban]
昨夜 zuo2ye4: last night
[さくや sakuya OR ゆうべ yuube: last night]



Japanese common word / expression / idiom
昨今 | さっこん sakkon: nowadays; recently

昨日の友は今日の敵 | きのうのともはきょうのてき kinou no tomo wa kyou no teki
: A friend today may be an enemy tomorrow

一昨日来やがれ | おとといきやがれ ototo iki yagare
: (slang) Don’t you ever come here again!

 Etymology:
形声 Pictophonetic.
(ri4: sun) suggests the meaning while
(zha4: first time) provides the sound.



 Examples:
昨天是他的生日。
zuo2tian1 shi4 ta1 de sheng1ri4.
Yesterday was his birthday.

Resources: Chinese Dictionary | Japanese Dictionary