Pounce
late Middle English (as a noun denoting a tool for stamping or punching): origin obscure, perhaps from puncheon1. The noun sense ‘a bird's claw’ arose in the late 15th century and gave rise to the verb (late 17th century).
wiktionary
From French ponce, from Latin pūmex. Doublet of pumice.
From Middle English pounce, probably akin to punch. Possibly from Old French ponchonner (compare French poinçonner).
etymonline
pounce (v.)
1680s, originally "to seize with the pounces," from Middle English pownse (n.) "hawk's claw" (see pounce (n.1)). The earlier verb sense was "perforate, make holes in" (late 14c.). Meaning "to jump or fall upon suddenly" is from 1812. Figurative sense of "lay hold of eagerly" is from 1840. Related: Pounced; pouncing. A doublet of punch (v.).
pounce (n.1)
"claw of a bird of prey," late 15c., pownse, probably from Old French ponchon "lance, javelin; spine, quill" (Modern French poinçon; see punch (v.)). So called for being the "claws that punch" holes in things. In falconry, the heel claw is a talon, and others are pounces. Hence, "a stab, thrust" (c. 1400). In Middle English also the name of a tool for punching holes or embossing metal (late 14c.), from pounce (v.) in the special sense of "ornament by perforation." Clothing ornamented with cut-out figures was pounced.
pounce (n.2)
"an act of jumping or falling upon," 1825, from pounce (v.).
