Some opposites of dawdled are hastened and hurried.
The car ahead dawdled, holding up all of the traffic.
We wouldn't have missed the parson's sermon if you hadn't dawdled about so long. How long had you dawdled there before the victim accosted you?
adverb
Ambulated, ambled, dawdled, paraded
To hang around idly; to waste time doing nothing.
Toddle, bottle, space-shottle... wait, no, not THAT one! coddle,mottle.SWADDLE
It's relaxing to dawdle in the shower, but it wastes water.
Downcast and dismayed, Danny felt quite dejected when dumped by his girlfriend.
dallied, damaged, dawdled, and that's just a few which have an 'a' as the second letter. There are to many other words which meet your criteria to list here.
Dawdle is a verb meaning "to waste time by being slow" "Don't dawdle or you're going to miss your bus!" "Jennifer dawdled along the beach for hours."
If you are thinking of "dawdled", it means having moved too slowly. "Dottle" can also mean small pieces of dirt or ash, and "dottled" might mean covered with such small pieces of dirt or ash.
The opposite (antonym) of opposite is same.