Middle English word warm comes from Proto-Indo-European *h₂i-h₂uer, Proto-Indo-European *gʷhormo-, and later Proto-Indo-European *wr̥mis (Worm.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *h₂i-h₂uer | Proto-Indo-European (ine-pro) | |
| *gʷhormo- | Proto-Indo-European (ine-pro) | |
| *wr̥mis | Proto-Indo-European (ine-pro) | Worm. |
| *warmaz | Proto-Germanic (gem-pro) | Warm (having a higher temperature than usual). |
| *wurmiz | Proto-Germanic (gem-pro) | Serpent, snake. Worm. |
| wearm | Old English (ang) | Warm. |
| wyrm | Old English (ang) | A creeping insect, maggot, grub, or worm. A serpent or snake. A worm or a snake, in the figurative sense of something lowly or despicable. |
| wurm | Middle English (enm) |