Fast, quick or speedy.
The opposite of swift is slow.
the opposite of slow down - fast up......heheheh lolzzz. i think that it has no opposite..even if it has a opposite then it may be - do it fast, be quick,etc
Slow
slow.
Slow.
slow down
Slow Hour
Slow and hard.
Slow paced.
The opposite of abrupt could be gradual, slow, or incremental.Calm, kind, nice...
late negligent slow tardy
to ebb is to reduce, slow down.