early 14c., croket, "ornamental roll or lock of hair," from Anglo-French crocket, from northern French form of Old French crochet, croquet, literally "a hook" (see crochet (n.)). In medieval architecture, "pointed ornamental device on a sloping pinnacle, gable, etc.," late 14c. Related: Crocketed.
"small portion of one country which is entirely surrounded by the territory of another," 1868, from French enclave, from Old French enclaver "enclose, comprise, include" (13c.), from Late Latin inclavare "shut in, lock up," from Latin in- "in" (from PIE root *en "in") + clavis "key" (from PIE root *klau- "hook"). Enclaved "surrounded by land owned by another" is attested in English from mid-15c., from Old French enclaver.
also rat's-tail, from rat (n.) + tail (n.1). Used since 16c. of conditions, growths, or devices held to resemble a rat's long, hairless tail in any way, including "lank lock of hair" (1810); "end of a rope" (1867). Related: Rat-tailed. A rat-tail file (1744) is a fine, round file used for enlarging holes in metal.
1550s, of uncertain origin, possibly from French ferler "to furl," from Old French ferliier "chain, tie up, lock away," perhaps from fer "firm" (from Latin firmus; from PIE root *dher- "to hold firmly, support") + -lier "to bind" (from Latin ligare; from PIE root *leig- "to tie, bind"). Also said to be a shortening of earlier furdle "to furl or fold." Related: Furled; furling. As a noun from 1640s.