-si

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Morpheme
Language:	Raetic, Etruscan
Type:	inflectional
Function:	pertinentive
Attestation:	avaśuerasi, esimnesi, esumnesi, kastriesi, kuninasi, laθurusi, lastasi, pitaunesi, ritauiesi, )si, φelturiesi

Commentary

Corresponding to the Etruscan pertinentive I (Rix 1985: 128, Wallace 2008: 47). Like the ablative, the pertinentive is built with genitive forms as base (on the possibility of genitives originally being adjectives of posession, enabling them to serve as bases for cases, see Rix 1985: 127). The pertinentive is historically a locative to the genitive, hence the complex pertinentive endings reflect both those of genitive and locative. The pertinentive I is based on the genitive I -s, historically -si: -si-i > -si. In this context, auslauting i survived apocope (while being lost in the genitive).