| Clue | Source | Date |
|---|---|---|
| Made a bubbling sound | Universal | 07 Sep 2026 |
| Burbled | ||
| Sounded like a brook | New York Times | 28 May 2025 |
| Babbled, like a baby | Eugene Sheffer | 09 Aug 2017 |
| Babbled, as a brook | ||
| Went loudly down the drain | ||
| Made "glub-glub" sounds | ||
| Sang baby-style | ||
| Babbled, as a brook | ||
| Flowed in a noisy way |