| Answer | Crossword Clue |
|---|---|
| ECHO | Sound in a big, empty room |
| ECHO | Sound in an empty room |
| ECHO | Empty room sound |
| hollowest | (of a sound) Echoing, as though made in or on an empty container |
| hollow | (of a sound) Echoing, as though made in or on an empty container |
| hollower | (of a sound) Echoing, as though made in or on an empty container |
