The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
wer-2
DEFINITION:
Conventional base of various Indo-European roots; to turn, bend. Derivatives include stalwart, weird, vertebra, wrath, wrong, wrestle, briar1, rhapsody, and worm. I. Root *wert-, to turn, wind. 1. Germanic *werth-.a. (i)ward, from Old English -weard, toward (< turned toward); (ii)inward, from Old English inweard, inward, from Germanic *inwarth, inward (*in, in; see en). Both (i) and (ii) from Germanic variant *warth;b. perhaps Germanic derivative *werthaz, toward, opposite, hence equivalent, worth. worth1; stalwart, from Old English weorth, worth, valuable, and derivative noun weorth,wierth, value. 2.worth2, from Old English weorthan, to befall, from Germanic *werthan, to become (< to turn into). 3. Zero-grade form *wt-.weird, from Old English wyrd, fate, destiny (< that which befalls one), from Germanic *wurthi-.4.versatile, verse1, version, versus, vertebra, vertex, vertigo, vortex; adverse, anniversary, avert, bouleversement, controversy, converse1, convert, dextrorse, divert, evert, extrorse, extroversion, extrovert, introrse, introvert, invert, malversation, obvert, peevish, pervert, prose, retrorse, revert, sinistrorse, subvert, tergiversate, transverse, universe, from Latin vertere, to turn, with its frequentative versre, to turn, and passive versr, to stay, behave (< to move around a place, frequent). 5.verst, from Russian versta, line, from Balto-Slavic *wirst-, a turn, bend. II. Root *wreit-, to turn. a.wreath, from Old English writha, band (< that which is wound around); b.writhe, from Old English wrthan, to twist, torture; c.wrath, wroth, from Old English wrth, angry (< tormented, twisted). ac all from Germanic *wrth-,*wraith-. III. Root *wergh-, to turn. 1.worry, from Old English wyrgan, to strangle, from Germanic *wurgjan.2. Nasalized variant *wrengh-.a.wring, from Old English wringan, to twist, from Germanic *wreng-;b. (i)wrong, from Middle English wrong, wrong, from a Scandinavian source akin to Old Norse *vrangr,rangr, curved, crooked, wrong; (ii)wrangle, from Middle English wranglen, to wrangle, from a Low German source akin to wrangeln, to wrestle. Both (i) and (ii) from Germanic *wrang-. IV. Root *werg-, to turn. 1. Nasalized variant form *wreng-.a.wrench, from Old English wrencan, to twist; b.wrinkle, from Old English gewrinclian, to wind (ge-, collective prefix; see kom). Both a and b from Germanic *wrankjan.2.verge2; converge, diverge, from Latin vergere, to turn, tend toward. V. Root *wreik-, to turn. 1a.wry, from Old English wrgian, to turn, bend, go; b.wriggle, from Middle Low German wriggeln, to wriggle. Both a and b from Germanic *wrg-.2a.wrist, from Old English wrist, wrist; b.gaiter, from Old French guietre, gaiter, from Frankish *wrist-. Both a and b from Germanic *wristiz, from *wrihst-.3.wrest, wrestle, from Old English wrstan, to twist, from secondary Germanic derivative *wraistjan.4. Possibly o-grade form *wroik-.briar1, brusque, from Late Latin brcus, heather, from Gaulish *brko-. VI.ribald, from Old French riber, to be wanton, from Germanic root *wrib-. VII. Root *werb-, also *werbh-, to turn, bend. 1.warp, from Old English weorpan, to throw away, from Germanic *werp-,*warp-, to fling by turning the arm. 2.reverberate, from Latin verber, whip, rod. 3.verbena, vervain, from Latin verbna, sacred foliage. 4. Zero-grade form *wb-.rhabdomancy, rhabdovirus, from Greek rhabdos, rod. 5. Nasalized variant form *wrembh-.rhombus, from Greek rhombos, magic wheel, rhombus. VIII. Root *werp-, to turn, wind. 1. Metathesized form *wrep-.wrap, from Middle English wrappen, to wrap, from a source akin to Danish dialectal vravle, to wind, from Germanic *wrap-.2. Zero-grade form *wp-.raphe, rhaphide; rhapsody, staphylorrhaphy, tenorrhaphy, from Greek rhaptein, to sew. IX. Root *wmi-, worm; rhyme word to kwmi-. 1.worm, from Old English wyrm, worm, from Germanic *wurmiz.2.vermeil, vermi-, vermicelli, vermicular, vermin, from Latin vermis, worm. (Pokorny 3. er- 1152.)