As verbs the difference between unbraced and unbraces
is that unbraced is past tense of unbrace while unbraces is third-person singular of unbrace.
As an adjective unbraced
is not braced.
unbraced
English
Verb
(head)
(unbrace)
Adjective
(-)
Not braced.
unbrace
English
Verb
(unbrac)
To undo, unfasten; to relax, loosen.
*1590 , Edmund Spenser, The Faerie Queene , II.iv:
*:The knight emboyling in his haughtie hart, / Knit all his forces, and gan soone vnbrace / His grasping hold [...].