Etymology
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Words related to *bhorh-

bore (v.1)
Old English borian "to bore through, perforate," from bor "auger," from Proto-Germanic *buron (source also of Old Norse bora, Swedish borra, Old High German boron, Middle Dutch boren, German bohren), from PIE root *bhorh- "hole."
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Boris 
Slavic masc. proper name, literally "fight," from Slavic root *bor- "to fight, overcome" (from PIE root *bhorh- "hole").
burin (n.)
engraver's tool, 1660s, from French burin, cognate with Italian bolino, Spanish buril, perhaps from Old High German bora "tool for boring" (from PIE root *bhorh- "hole"). Related: Burinist.
foramen (n.)
plural foramina, 1670s, from Latin foramen "hole, opening, aperture, orifice," from forare "to pierce" (from PIE root *bhorh- "hole").
Foraminifera 

order of Protozoa furnished with a shell, 1835, Modern Latin, neuter plural of foraminifer "bearing holes," from Latin foramen "hole, opening, orifice" (from PIE root *bhorh- "hole") + -fer "bearing," from ferre "to bear" (from PIE root *bher- (1) "to carry," also "to bear children"). So called because the shells usually are perforated by pores. Related: Foraminiferal.

foraminous (adj.)
"full of holes," 1620s, from Late Latin foraminosus, from Latin foramen "hole, opening" (from PIE root *bhorh- "hole").
interfere (v.)

formerly also enterfere, mid-15c., enterferen, "intermingle or mix (different things), interpose," also "to interfere," from Old French enterferer "exchange blows, strike each other," from entre- "between" (see entre-) + ferir "to strike," from Latin ferire "to knock, strike," related to Latin forare "to bore, pierce" (from PIE root *bhorh- "hole"). Compare punch (v.), which has both the senses "to hit" and "to make a hole in").

Figurative sense of "to meddle with, oppose unrightfully" is from 1630s. Related: Interfered; interfering. Modern French interférer is from English.

interference (n.)
1783, "intermeddling," from interfere on model of difference, etc. In physics, in reference to the mutual action of waves on each other, from 1802, coined in this sense by English scientist Dr. Thomas Young (1773-1829). Telephoning (later broadcasting) sense is from 1887. In chess from 1913; in U.S. football from 1894.
perforate (v.)

"bore through, pierce, make a hole or holes in," late 15c. (implied in perforated), a back-formation from perforation or else from Latin perforatus, past participle of perforare "to bore through, pierce through," from per "through" (from PIE root *per- (1) "forward," hence "through") + forare "to pierce" (from PIE root *bhorh- "hole"). Related: Perforating.

perforation (n.)

early 15c., perforacioun, "hole made through something;" mid-15c., "action of boring or piercing," from Medieval Latin perforationem (nominative perforatio), noun of action from past participle stem of Latin perforare "bore or pierce through," from per "through" (from PIE root *per- (1) "forward," hence "through") + forare "to pierce" (from PIE root *bhorh- "hole").