Is Watercolor That Has Been Made Opaque By Adding Inert White Pigment To It?

Is Watercolor That Has Been Made Opaque By Adding Inert White Pigment To It? Impasto is watercolor that has been made opaque by adding inert white pigment to it. What is the water based paint media that adds white chalk to create an opaque paint? Compared to watercolors, gouache has larger particles of pigment, and