The dog wagged its tail happily as it ran through the park.
Meaning: This means the dog was very happy while running in the park.
Choice of Words: Wag means to move something quickly back and forth. Tail is the long, thin part of an animal's body that sticks out behind. Happily means feeling or showing pleasure or contentment. Park is a public area with trees, grass, and other features for recreation. When you put them together, it means the dog was happy and excited as it ran through the park, wagging its tail.
Alternative Expressions
Related Expressions