English · Adjectives
fast
/fæst/
[/fæst/]
at a high speed
Beginneradverb
Definition
As an adverb, fast means quickly or at a high speed.
Example
Don't drive too fast on this road.
Don't drive too fast on this road.
Etymology
From Old English 'fæst' meaning firm; the sense of speed came later.
How & Where It’s Used
Used after verbs of movement; it has the same form as the adjective.