| 1 | Middle English | cloud | A small elevation; a hill; A clod, lump, or... |
| 2 | Old English | clūd | mass of stone, rock, boulder, hill; rock, boulder |
| 3 | Proto-West Germanic | klūt | — |
| 4 | Proto-Germanic | klūtaz | lump, clod; boulder, rock; hill |
| 5 | Proto-Indo-European | gelewdos | — |
| 6 | Indo-European | *gel- | — |