slow is an antonym for fast.
rapid, brisk, prompt, ready :D thesaurus.com
active, fast, and energetic.
cheerful or brisk; but commonly interpreted as lively, fast
antonym: slow
Allegro means cheerful Italian, but musically it means speedy.
fairly fast.
Fast
fast
It is to go fast an he antonym is to go slow
Quick, swift and brisk are only a few. :)
Synonyms.