- leech
- {{11}}leech (1) "bloodsucking aquatic worm," from O.E. læce (Kentish lyce), of unknown origin (with a cognate in M.Du. lake). Commonly regarded as a transferred use of LEECH (Cf. leech) (2), but the Old English forms suggest a distinct word, which has been assimilated to leech (2) by folk etymology [see OED]. Figuratively applied to human parasites since 1784.{{12}}leech (2) obsolete for "physician," from O.E. læce, probably from O.Dan. læke, from P.Gmc. *lekjaz "enchanter, one who speaks magic words; healer, physician" (Cf. O.Fris. letza, O.S. laki, O.N. læknir, O.H.G. lahhi, Goth. lekeis "physician"), lit. "one who counsels," perhaps connected with a root found in Celtic (Cf. Ir. liaig "charmer, exorcist, physician") and Slavic (Cf. Serbo-Cr. lijekar, Pol. lekarz, Rus. lekaráпїЅпїЅ), from PIE *lep-agi "conjurer," from root *leg- "to collect," with derivatives meaning "to speak" (see LECTURE (Cf. lecture) (n.)).For sense development, Cf. O.C.S. baliji "doctor," originally "conjurer," related to Serbo-Cr. bajati "enchant, conjure;" O.C.S. vraДЌi, Rus. vraДЌ "doctor," related to Serbo-Croatian vraДЌ "sorcerer, fortune-teller." The form merged with LEECH (Cf. leech) (1) in Middle English, apparently by folk etymology. In 17c., leech usually was applied only to veterinary practitioners. The fourth finger of the hand, in Old English, was læcfinger, translating L. digitus medicus, Gk. daktylus iatrikos, supposedly because a vein from that finger stretches straight to the heart.
Etymology dictionary. 2014.