un·bend 
/ˌʌnˈbɛnd/ verb
un·bends; un·bent /ˌʌnˈbɛnd/ verb /-ˌbɛnt/ un·bend·ing 1 : to make (something) straight or to become straight [+ obj] ▪ He was bending and unbending his fingers. [no obj] ▪ His fingers were bending and unbending. 2 [no obj] : to stop being serious or tense : relax
▪ He unbent a little at the party.
▪ He unbent a little at the party.
