straighten out in WordNet English dictionary

1. put (things or places) in order
   "Tidy up your room!"
   tidy  tidy up  clean up  neaten  straighten  straighten out  square away 
   
2. make free from confusion or ambiguity; make clear
   "Could you clarify these remarks?"; "Clear up the question of who is at fault"
   clear  clear up  shed light on  crystallize  crystallise  crystalize  crystalise  straighten out  sort out  enlighten  illuminate  elucidate 
   
3. extricate from entanglement
   "Can you disentangle the cord?"
   disentangle  unsnarl  straighten out 
   
4. settle or put right
   "we need to iron out our disagreements"
   iron out  straighten out  put right 
   
5. change for the better
   "The lazy student promised to reform"; "the habitual cheater finally saw the light"
   reform  straighten out  see the light 
   
6. make straight
   straighten  straighten out 
   

straighten out in English Wiktionary