Dutch word vlieg comes from Proto-Indo-European *plewk-, Proto-Indo-European *plew-k-, Proto-Indo-European *pleuk-, and later Proto-Germanic *fleuganą (To fly.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *plewk- | Proto-Indo-European (ine-pro) | |
| *plew-k- | Proto-Indo-European (ine-pro) | |
| *pleuk- | Proto-Indo-European (ine-pro) | |
| *fleuganą | Proto-Germanic (gem-pro) | To fly. |
| *fleugǭ | Proto-Germanic (gem-pro) | Flying insect, fly. |
| fliega | Old Dutch (odt) | |
| vlieghe | Middle Dutch (dum) | |
| vlieg | Dutch (nld) | A fly. |