 In this case the meaning changes from being part of a body into being a body part that is somehow separated from the rest of the body.This is analogous to the same process of optional possession in English, thus "xóots shá" means “a bear’s head”, but "xóots shayí" means “a bear head” or “a bear’s head detached from its body”.Citation forms of inalienable nouns are usually indicated with a preceding dummy possessor noun.