| Answer | Crossword Clue |
|---|---|
| CHIRP | Sound happy |
| COO | Happy sound |
| CHIRP | Happy sound |
| PURR | Happy engine sound |
| SWISH | Happy hoops sound |
| PURR | Happy cat's sound |
| GURGLE | Happy infant's sound |
| PITAPAT | Happy heartbeat sound |
| PURR | Happy tabby sound |
| NEIGH | Trigger-happy sound? |
| PURR | Sound of a happy engine |
| PURR | Sound of a happy cat |
| PURR | Sound of a happy Persian |
| CHORTLE | Portmanteau word coined by Lewis Carroll that's a happy sound |
