Duck

verb

1. To quickly lower the head or body in order to prevent it from being struck by something.
2. To quickly lower (the head) in order to prevent it from being struck by something.
3. To lower (something) into water; to thrust or plunge under liquid and suddenly withdraw.
4. To go under the surface of water and immediately reappear; to plunge one's head into water or other liquid.
5. To bow.