English word quark comes from Proto-Slavic *-ogъ, Proto-Slavic *tvorъ, Proto-Slavic *tvьrdъ (Hard, firm, solid.), Proto-Slavic *tvrьdъ
| Dictionary entry | Language | Definition |
|---|---|---|
| *-ogъ | Proto-Slavic (sla-pro) | |
| *tvorъ | Proto-Slavic (sla-pro) | |
| *tvьrdъ | Proto-Slavic (sla-pro) | Hard, firm, solid. |
| *tvrьdъ | Proto-Slavic (sla-pro) | |
| тврьдъ | Church Slavic (chu) | Firm. |
| *tvarogъ | Proto-Slavic (sla-pro) | Quark (soft creamy cheese). |
| twarc | Middle High German (gmh) | |
| Quark | German (deu) | A quark (particle) (informal) rubbish, nonsense, baloney. Quark (cheese). |
| quark | English (eng) | A soft creamy cheese, eaten throughout northern, central, and eastern Europe, very similar to cottage cheese except that it is usually not made with rennet. |