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"sharp" is also used as a crossword clue. If that's what you saw, the answer is often astute (6 letters).
Definitions
Having a fine edge; also quick-minded
Word origin
From Middle English scharp, from Old English sċearp, from Proto-West Germanic *skarp, from Proto-Germanic *skarpaz, from Proto-Indo-European *(s)kerb-, from *(s)ker- (“to cut”).
Used in a sentence
“I keep my knives sharp so that they don't slip unexpectedly while carving.”
“Ernest made the pencil too sharp and accidentally stabbed himself with it.”
“a face with sharp features”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Having a fine edge”5 letters
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