Example : We need to iron out our disagreements.

Synonyms : iron out, put right

Example : Can you disentangle the cord?.

Synonyms : disentangle, unsnarl

Example : The lazy student promised to reform.
The habitual cheater finally saw the light.

Synonyms : reform, see the light

Synonyms : straighten

Example : Could you clarify these remarks?.
Clear up the question of who is at fault.

Synonyms : clear, clear up, crystalise, crystalize, crystallise, crystallize, elucidate, enlighten, illuminate, shed light on, sort out

Example : Tidy up your room!.

Synonyms : clean up, neaten, square away, straighten, tidy, tidy up