the word "yours" is the possessive form of the second-person pronoun "you". its development traces back through middle english "youres", which was formed by adding the possessive suffix "-s" to the pronoun "your". "your" itself originates from old english "ēower", the genitive form of "gē" (the plural "you"). this old english pronoun has germanic roots, ultimately deriving from the proto-germanic "jūz", related to the proto-indo-European "yū́" (second-person plural pronoun). the evolution from a simple genitive case form in old english to a distinct, standalone possessive pronoun in modern english illustrates the grammatical shift from a more inflectional system to one relying on analytic constructions. the logic of "yours" is inherently relational, directly and exclusively indicating possession by the addressee(s).

the word is a possessive pronoun form derived from the pronoun "you". it is not productively segmented into smaller, meaningful morphemes in modern english.