The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
koro-
DEFINITION:
War; also war-band, host, army. 1.heriot, from Old English here, army. 2.arrière-ban, from Old French herban, a summoning to military service (ban, proclamation, summons; see bh-2). 3a.harbor, from Old English herebeorg, lodging; b.harbinger, from Old French herberge, lodging. Both a and b from Germanic compound *harja-bergaz, “army hill,” hill-fort, later shelter, lodging, army quarters (*bergaz, hill; see bhergh-2). 4.herald, from Anglo-Norman herald, from Germanic compound *harja-waldaz, “army commander” (*wald-, rule, power; see wal-). 5.harness, from Old French harneis, harness, from Germanic compound *harja-nestam, “army provisions” (*nestam, food for a journey; see nes-1). 6.harry, hurry, from Old English hergian, to ravage, plunder, raid, from Germanic denominative *harjn.7.harangue, from Old Italian aringo,arringa, public square, from Germanic compound *harihring, assembly, “host-ring” (*hringaz, ring; see sker-2). 1–7 all from Germanic *harjaz, army. (Pokorny koro-s 615.)
-2). 3a. harbor, from Old English herebeorg, lodging; b. harbinger, from Old French herberge, lodging. Both a and b from Germanic compound *harja-bergaz, “army hill,” hill-fort, later shelter, lodging, army quarters (*bergaz, hill; see bhergh-2). 4. herald, from Anglo-Norman herald, from Germanic compound *harja-waldaz, “army commander” (*wald-, rule, power; see wal-). 5. harness, from Old French harneis, harness, from Germanic compound *harja-nestam, “army provisions” (*nestam, food for a journey; see nes-1). 6. harry, hurry, from Old English hergian, to ravage, plunder, raid, from Germanic denominative *harj
n. 7. harangue, from Old Italian aringo, arringa, public square, from Germanic compound *harihring, assembly, “host-ring” (*hringaz, ring; see sker-2). 1–7 all from Germanic *harjaz, army. (Pokorny koro-s 615.) 
