Swoop (verb)

1. Move swiftly and suddenly down or across something, typically in order to grab or capture something.
2. Make a sudden and dramatic descent or attack.
3. Move in a graceful and confident manner.

Origin:

Late 16th century, from middle english swoupen, from old norse svopa "to sweep".

Examples:

1. The hawk swooped down to catch the mouse.
2. The police swooped in to make the arrest.
3. She swooped in to save the day.
4. The bird of prey swooped low over the field.
5. The singer swooped into the high notes with ease.