Is this your crossword clue?
"swift" is also used as a crossword clue. If that's what you saw, the answer is often quick (5 letters).
Definitions
Moving or happening very fast.
Word origin
From Middle English swift, from Old English swift (“swift; quick”), from Proto-Germanic *swiftaz (“swift; quick”), from Proto-Indo-European *(s)weyp- (“to twist; wind around”). Cognate with Icelandic svipta (“to pull quickly”), Old English swīfan (“to revolve, sweep, wend, intervene”). More at swivel.
Used in a sentence
“swift action”
“swift response”
“swift recovery”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Very quick”5 letters
02“Fast”5 letters
Not quite right?
"Search similar patterns."
S____