whose◼◼◼(of which (relative)) determiner [UK: huːz] [US: ˈhuːz]The tree whose trunk our initials were carved on was cut down. = L'arbre sur le tronc duquel nos initiales étaient gravées a été abattu.
duquel (de + lequel) determiner
whose◼◼◼(of whom (relative)) determiner [UK: huːz] [US: ˈhuːz]The tree whose trunk our initials were carved on was cut down. = L'arbre sur le tronc duquel nos initiales étaient gravées a été abattu.