Du is the conjunction of de le. Dû is the past participle of devoir
No, it is French.
sand is called "du sable" in French.
The French word for schedule is calendrier.
French
"Du travail."
French use Cash or du liquide.
les toilettes du bas, les toilettes du rez-de-chaussée
faire du surf
du poulet
soufflage du verre
"pas du tout"
"Du hoc" is not a French word. It may be a misspelling or a term in another language. Can you provide more context or specify the language you are referring to?