straighten
Concise Oxford English Dictionary © 2008 Oxford University Press:
straighten/ˈstreɪtn/
▶verb
- 1 make or become straight.
■ stand or sit erect after bending.
- 2 (straighten up) (of a vehicle, ship, or aircraft) stop turning and move in a straight line.
– derivatives
straightener noun.
straightener noun.
'straighten' also found in these Oxford entries:

