straighten

verb7

1. •
   to make something lie in one line, so that no part of it turns to the side
2. •
   To become straight.
3. •
   To stand up, especially from a sitting position.
4. •
   To put in order; to sort; to tidy up.
5. •
   To clarify a situation or concept to (an audience).
6. •
   (informal) To make heterosexual.
7. •
   (slang) To bribe or corrupt.