Definition of swiftness in English:

swiftness

noun

mass noun
  • 1The quality of moving at high speed.

    ‘Kay had the upper hand with her agility and swiftness’
    ‘the turtle ran on shore with remarkable swiftness’
    • ‘The shark attacked with a suddenness and swiftness that took them all by surprise.’
    • ‘Perhaps more than anything else it was the swiftness of the company's demise that stunned so many onlookers.’
    • ‘The ships were known for their incredible swiftness and maneuverability.’
    • ‘He stood up with surprising swiftness for his age.’
    • ‘Should he go slowly or with decisive swiftness?’
    speed, speediness, quickness, velocity, celerity, fleetness, fastness, rapidity, rapidness, liveliness
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    1. 1.1 Lack of delay; promptness.
      ‘researchers were impressed with the swiftness of responses’
      ‘the dynasty crumbled with alarming swiftness’
      • ‘The university responded with astonishing swiftness.’
      • ‘The replies came with surprising swiftness.’
      • ‘The team's decision came with relative swiftness.’
      • ‘With remarkable swiftness, he has already reviewed the launch.’
      • ‘With unprecedented swiftness, government lawyers cut through the paperwork.’
      promptness, immediateness, immediacy, instantaneousness, rapidity, rapidness, dispatch, punctuality
      suddenness, abruptness, instantaneity, rapidity, rapidness, haste, hastiness, briskness, hurriedness, hurry
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Pronunciation

swiftness

/ˈswɪftnəs/