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c.1300, claspe, "metal catch or hook used to hold things together," perhaps a metathesis of clapse, and thus from or related to Old English clyppan "clasp" (see clip (v.2)).
late 14c., from clasp (n.). Related: Clasped; clasping.
clasp (klāsp)n. A part of a removable partial denture that directly retains or stabilizes a denture.