straighten

Meanings

• straighten up or out; make straight
• make straight
• get up from a sitting or slouching position
  • "The students straightened when the teacher entered"
• put (things or places) in order
• straighten by unrolling
• make straight or straighter
  • "Straighten this post"
  • "straighten hair"

Synonyms

clean up, neaten, roll out, square away, straighten out, tidy, tidy up, unbend