Split coordination with adjectives in Italian

This work investigates the morphosyntax of nominal expressions in Standard Italian that have multiple adjectives in “split coordination,” which permits a plural noun to be modified by singular adjectives, for example le mani destra e sinistra (the hand.pl left.sg and right.sg). The proposal is (i) that these expressions are built from multidominant structures, with a constituent shared by the conjuncts, and (ii) that plural marking on the noun reflects “summative” feature resolution on the nP comparable to coordination resolution. This proposal captures various properties of split-coordinated expressions, including the availability of adjective stacking and of feature-mismatched conjuncts, as well as agreement with a class of nouns that “switch” gender in the plural. Taking agreement with resolving features to be a form of semantic agreement, which has been argued to be possible only in certain syntactic configurations (Smith 2015, 2017, 2021), the account captures prenominal-postnominal adjective asymmetries in split coordination. The work offers a coherent account of coordination and semantic agreement in the nominal domain, connects split coordination to related phenomena such as nominal right node raising and adjectival hydras, and, more broadly, evinces the unity of nominal and verbal agreement, pace analyses of nominal concord (Norris 2014).