swift

US /swɪft/
UK /swɪft/
"swift" picture
1.

happening or moving quickly or promptly

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The gazelle is known for its swift movements.
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We need to take swift action to resolve this issue.
:
rapidquickfastspeedyexpeditious
:
slowleisurely
1.

a small, fast-flying insectivorous bird with long, narrow wings and a forked tail, typically dark in plumage

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A swift darted across the evening sky.
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The old church tower is a nesting site for swifts.
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apodecypselid