|ən|brās transitive verb
Etymology: Middle English unbracen to carve, remove clothing or armor from, from un- (II) + bracen to fasten tightly — more at brace
1. archaic : carve , disjoint
2.
a. : to remove the holding power of by or as if by untying a bond
b. : to free or detach by or as if by untying a brace ; specifically : to untie the string from (a bow)
3. : enfeeble , weaken