Double-marking language
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A double-marking language is one where the grammatical marks showing relations between different constituents of a phrase tend to be placed on both the heads (or nuclei) of the phrase in question, and on the modifiers or dependents. Pervasive double marking is rather rare, but instances of double-marking occur in many languages.
For example, in Turkish, in a genitive construction involving two definite nouns, both the possessor and the possessum are marked, the former in the genitive case, the latter with a suffix marking the possessor (and corresponding to a possessive adjective in English).
Another example would be a language in which gender- and/or case endings are used to indicate the role of both nouns and their associated modifiers (such as adjectives) in a sentence (e.g. Russian, Spanish); or in which case endings are supplemented by verb endings marking the subject, direct object and/or indirect object of a sentence.
