straighten
straigh-ten
verb
To make something tidy, flat, or no longer bent or curved.
"Could you straighten the picture on the wall?"
verb
To make oneself stand or sit upright, improving posture or appearance.
"Straighten up, you're slouching!"
verb
To resolve a problem or misunderstanding, making a situation clear.
"We need to straighten out this issue quickly."
Thesaurus
Synonyms: straighten out, square away, clean up, neaten, tidy, tidy up, unbend, roll out