haltingly Antonyms

in a tick continuingly before you can say knife quick as a flash in one fell swoop at one stroke at a stroke asudden all of the sudden in an instant high-speed approvingly authoritatively astonishingly in a jiffy in one stroke on a dime at one fling all in one go all at one time before the ink is dry like greased lightning at warp speed at the speed of light before you know it at half cock almost immediately with bells on sonic overwhelmingly all of a sudden all at once hastily hardily formidably forcibly fluently dynamically commandingly briskly brisk breakneck blistering apace accelerated instantaneous instantly meteoric at once toughly