| Anc.Greek | phaiós | dark |
| Esp. | feo | ugly |
| Germ. reg. | fosskopf | Goosander, 61 (female) |
| Ital.: Aquila | fòss | dark |
| Franç. | foncé | dark |
| Esp.: a.Alpujarra | foscazo | heat |
| Esp.: a.Alpujarra | fosca | neblina, calina |
| Cat. | fosc | dark |
| Ital. | fosco | dark |
| l. | fuscus | dark |
| Ital.: Badia | fosc | dark (Dolomites foSc,fuSc) |
| Ital.: Otr. | capufiuscu | Wigeon, 46 |
| R.Rom. | fuosch | a red-brown horse |
| R.Rom. | fux | (metath.) red-brown |
| Germ. | fuchs | fox, cf. zorroð3.2.48.2.; nom propre très répandu |
| Germ.reg. | fuchsente | Ferruginous Duck, 51 |
| Germ.reg. | fuchseule | Hulotte, 238 |
| Germ.reg. | zaunfuchs | Wren, 406 |
| Engl. | fox | a reddish animal, cf. zorroð3.2.48.2. |
| Engl. | foxy, foxed | turned reddish brown with age (of colours, books) |