Select the most appropriate one-word substitution for the given group of words

Shaking of tail by animals specially dogs.

Wagging

The most appropriate one-word substitution for the given group of words is wagging.

• Wagging means to move something back and forth quickly and rhythmically.
• Shaking means to move something back and forth quickly and irregularly.
• Nodding means to move one's head up and down in a quick, short movement.