| Anc.Greek | mórychos | dark |
| Ital.: Sic. | moricana | Woodchat |
| Roman. | morico | dark blue |
| Franç. | moricaud | Moore |
| Franç.rég. | moraquin | Black Redstart, 348 |
| Ital.reg. | morago | Black Redstart, 348 |
| Ital.reg. | moriziola | Dunnock, 408 |
| Ital.reg. | morrachiol | Black Swift, 321 |
| Alb. | murrak | dark grey; a dark red cow; House Sparrow, 410 |
| Sbc. | morak | Turkey, 5 |
| Ital.: Rovio (TI) | murc | "mole colour" |
| Ital.: Rovio (TI) | mürc | dark grey |
| Galice | murcho | also mucho,murcio,mucio brown |
| Alb. | murçaku | Tufted Duck, 48 |
| Engl. | murky | dark, gloomy |
| Engl. | merk | Blackbird, 343 |
| Slavic, Germ. root | mrk | dark |
| Ukr. | smerk | twilight |
| Czech | soumrak | id. |
| Czech | mrácek, mrázek | Nightjar, 251 (bird of the twilight) |
| Sbc. | mrácnik | id. |