straighten

(verb) straighten up or out; make straight. Synonyms: unbend.

(verb) make straight. Synonyms: straighten out.

(verb) get up from a sitting or slouching position. Example: "The students straightened when the teacher entered."

(verb) put (things or places) in order. Synonyms: tidy, tidy up, clean up, neaten, straighten out, square away. Example: "Tidy up your room!."

(verb) straighten by unrolling. Synonyms: roll out. Example: "Roll out the big map."

(verb) make straight or straighter. Examples: "Straighten this post." "Straighten hair."