1.
early
At an early time.
2.
quickly, fast
At a rapid pace.
早く is the adverbial form of the i-adjective 早い. It covers three related meanings: early (time), quickly (speed), and soon (desire for something to happen).
Forms
早い → 早く (i-adjective → adverb by changing い to く)
Kanji distinction
- 早く: early or quickly (time-oriented — covers both meanings)
- 速く: fast, at high speed (purely about speed)
In practice, 早く is used for both senses and is the more common spelling.
Common expressions
Usage
早く! on its own works as an urging expression: "Hurry up!"