| Answer | Crossword Clue |
|---|---|
| subjacent | lying under or below something |
| subjacently | SUBJACENT, lying under or below something |
| substratum | something that is spread or laid under something else; a stratum or layer lying under another |
| buoy | floating object moored to the bottom to mark a channel or something (as a shoal) lying under the water |
| undercutting | Cut or wear away the part below or under (something, esp. a cliff) |
| undercut | Cut or wear away the part below or under (something, esp. a cliff) |
| undercuts | Cut or wear away the part below or under (something, esp. a cliff) |
