This is the 2338th most frequent Japanese word.
はや
"はや" (haya) means "early" or "quick."
Adverbial use of 'はやい' to mean 'early' in terms of time.
朝早く起きるのは健康に良いですね。
Waking up early in the morning is good for health.
Adjective use of 'はやい' to describe the quickness of an action.
彼の作業ペースは非常にはやい。
His working pace is very fast.
Adverbial use of 'はやく' to indicate an earlier occurrence.