gore (n.1) Look up gore at Dictionary.com
"thick, clotted blood," Old English gor "dirt, dung, filth, shit," a Germanic word (cognates: Middle Dutch goor "filth, mud;" Old Norse gor "cud;" Old High German gor "animal dung"), of uncertain origin. Sense of "clotted blood" (especially shed in battle) developed by 1560s (gore-blood is from 1550s).
gore (v.) Look up gore at Dictionary.com
"to pierce, stab," c. 1400, from Middle English gore (n.) "spear," from Old English gar "spear" (see gar, also gore (n.2) "triangular piece of ground"). Related: Gored; goring.
gore (n.2) Look up gore at Dictionary.com
"triangular piece of ground," Old English gara "corner, point of land, cape, promontory," from Proto-Germanic *gaizon- (source also of Old Frisian gare "a gore of cloth; a garment," Dutch geer, German gehre "a wedge, a gore"), from PIE *ghaiso- "a stick, spear" (see gar). The connecting sense is "triangularity." Hence also the senses "front of a skirt" (mid-13c.), and "triangular piece of cloth" (early 14c.). In New England, the word applied to a strip of land left out of any property by an error when tracts are surveyed (1640s).