Middle English word longen comes from Proto-Indo-European *legʷh-, Proto-Indo-European *dl̥h₁gʰós (Long.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *legʷh- | Proto-Indo-European (ine-pro) | light, not heavy |
| *dl̥h₁gʰós | Proto-Indo-European (ine-pro) | Long. |
| *langōną | Proto-Germanic (gem-pro) | To desire; long for. |
| langian | Old English (ang) | To grieve for, pine, be pained by. To long, yearn for. |
| longen | Middle English (enm) | To long. |