(By Thomas Stolz, Cornelia Stroh, and Aina Urdze): "The present chapter provides an overview of the relations that hold between comitatives and instrumentals in the languages of the world. Comitative and instrumental are labels for grammaticalized semantic relations between participants of an event. For the purposes of coding such relations, a wide variety of relator morphemes is used, such as case affixes and adpositions. For convenience, all of the relevant relators are glossed by with in the examples below. For the present purpose, we have looked only at the most grammaticalized overt morphological expressions. Stylistic and other variation has been discounted for obvious reasons. Moreover, we restrict this presentation to prototypical instances of comitatives and instrumentals. ❡
Prototypically, a comitative relator morpheme is employed to encode accompaniment."