un·bend 
(
ŭn-b
ĕnd
)
v. un·bent (-bĕnt), un·bend·ing, un·bends
v.tr.1. To release from mental tension, strain, or formality; relax.
2. To release (a bow, for example) from flexure or tension.
3. Nautical To untie or loosen (a rope or sail).
4. To straighten (something crooked or bent): unbend a paper clip.
v.intr.1. To become less tense; relax.
2. To become less strict.
3. To become straight.
un·benda·ble adj.