Từ trái nghĩa của slowly but surely

instantly immediately promptly instantaneously forthwith directly now pronto straightaway instanter straightway quickly presently headlong incontinently right plumb bang suddenly abruptly speedily swiftly posthaste rapidly forthright ekdam spontaneously PDQ at once right away straight away without delay right now straight off in a flash this minute this instant post-haste right off on the double on the spot in an instant in a trice in no time that instant there and then like a shot this very minute then and there tout de suite in a jiffy that minute in two shakes toot sweet like a flash in double quick time in a second in a moment that very minute here and now in a minute double quick all of a sudden in less than no time before you can say Jack Robinson in a wink in the twinkling of an eye before you know it at a stroke on a dime quick as lightning on the instant double-time first off in the blink of an eye like greased lightning at the speed of light in a split second like lightning in a fraction of a second like an arrow from a bow unexpectedly unanticipatedly sharply without warning asudden unawares without notice by surprise without hesitation all at once shortly fast unhesitatingly soon summarily out of the blue hereupon thereupon urgently as fast as possible without further ado on spur of moment on the spur of the moment as soon as possible on the nail at short notice anon like now on the dot now or never in nothing flat precipitately precipitously short soon afterward with all speed without a second thought acutely in a New York minute sharp

rapidly quickly fast like the wind briskly speedily swiftly hastily expeditiously promptly posthaste precipitately apace fleetly presto pronto abruptly quick hurriedly snappily hotfoot in a rush like blazes like crazy like mad like the clappers at speed in haste in short order at full speed at warp speed in a hurry at a rate of knots at the speed of light flat-out in a flash like a shot like lightning very quickly at a gallop lickety-split post-haste at full tilt by leaps and bounds double quick double-quick full tilt at full throttle at the double chop-chop hell-for-leather fast and furious hell for leather a mile a minute like a bat out of hell like a bomb like a streak like gangbusters like greased lightning like wildfire like a madman like a madwoman with dispatch like nobody's business like the deuce like billy-o like a scalded cat PDQ

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