IPA: /ʌnˈbɛər/
KK: /ʌnˈbɛr/
To take away or loosen the control or restraint from something, especially in relation to a horse's rein.
The trainer decided to unbar the horse to allow it more freedom.
Past: unbore
Past Participle: unbore
Unbear is formed from "un-" (meaning not) and "bear" (from Old English "beran", meaning to carry or endure). The word means to not be able to endure or carry something.
Think of 'not' ('un-') being able to 'carry' ('bear') something — that's why 'unbear' means to not be able to endure.