Dialectal or archaic equivalent of 早く. Used adverbially to mean doing something early or promptly. Common in Kansai dialect and older speech.
See also: 早く
Come home early, okay?
early time; early stage
Noun use, mostly in set phrases or older language. Refers to an early point in time or an early phase of life. Rare in modern standard Japanese.
I prepared from an early stage.
If you don't do it quickly, you'll be late.
早うのうちに身につけた習慣は大切だ。
Habits acquired early in life are important.
good morning
Derived from the classical adverbial form of 早い (はやい), via regular sound change from 早く (はやく) to 早う (はよう). The form is preserved in some dialects and older texts.