The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
gwhen-
DEFINITION:
To strike, kill. Derivatives include bane, fence, and offend. 1. O-grade form *gwhon-.a.bane, from Old English bana, slayer, cause of ruin or destruction; b.autobahn, from Middle High German ban,bane, way, road (< strike in a technical sense like swath). Both a and b from Germanic suffixed form *ban-n-.2. Suffixed zero-grade form *gwh-ty-.a.gun, from Old Norse gunnr, war; b.gonfalon, from Italian gonfalone, standard, from Germanic compound *gund-fann-, battle flag (*fann-, flag; see pan-). Both a and b from Germanic *gundj, war, battle. 3. Suffixed form *gwhen-do-.a.defend, defense, fence, fend, from Latin dfendere, to ward off (d-, away; see de-); b.offend, offense, from Latin offendere, to strike against, be offensive, offend (ob-, against; see epi). 4. Suffixed zero-grade form *gwh-tro-.bezoar, from Persian zahr, poison, from Old Iranian *jathra-.5. Full-grade form *gwhen-.bonze, from Sanskrit hanti, he strikes. (Pokorny 2. ghen-()- 491, bhen- 126.)