Meaning

noun (military) a temporary or supplementary fortification; typically square or polygonal without flanking defenses

noun an entrenched stronghold or refuge

originEtymology tree Proto-Italic *wre- Latin re-der. Old French re-bor. Middle English re- English re- Proto-Italic *du(i)βwos Latin *dubosdenom. Latin dubō Proto-Indo-European *-tós Proto-Italic *-tos Latin -tus Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Italic *-āō Latin -ō Latin -tō Latin -itō Latin dubitō Old French doterbor.…

Etymology from Wiktionary, CC BY-SA 3.0