Terms for subject General containing to cast

English	French
he'll have to keep his cast on	il devra garder son plâtre
his leg is in a plaster cast up to the knee	son plâtre monte jusqu'au genou
I have asked my uncle to cast my vote	j'ai délégué mon oncle pour voter à ma place
will he have to have a cast?	aura-t-il besoin d'être plâtré?