| 1 | Old English | sīd | wide, broad, spacious, ample, extensive, vast,... |
| 2 | Proto-West Germanic | *sīd | — |
| 3 | Proto-Germanic | sīdaz | drooping, hanging down, pendulous, long,... |
| 4 | Proto-Indo-European | sēy- | to send, throw, drop, sow, deposit; to linger |
| 5 | Proto-Indo-European | ḱe- | demonstrative particle; here; this, here |