Third-person singular simple present indicative form of knack.(verb)
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Use "knacks" in a sentence
"Every five minutes, one of the principal characters kept using lush adjectives to describe all these they-don't-make-'em-like-that-anymore vintage household items and knick-knacks from the simpler days of yore and going on and on about what exquisite pleasure they afforded the users."
"The "knacks" these witches use, they come from Satan."
"Maybe the ministers were not wholly wrong about those with hidden powers-or "knacks," as the Americans quaintly called them."