| 1 | Icelandic | sömuleiðis | — |
| 2 | Icelandic | leið | route, way, course; method, means |
| 3 | Old Norse | leið | a way; a way, a road; a course |
| 4 | Proto-Germanic | laidō | a leading; a way, course, route, direction |
| 5 | Proto-Indo-European | leyt- | to scratch; to leave, die; to go, go forth, die |
| 6 | Proto-Indo-European | lēy- | to leave, let; to want, desire; to let; leave... |