Comitative case

The comitative case (sometimes called the associative) is a grammatical case that expresses the companionship relationship. Some of the languages in which this case is used are Finnish, Basque, Hungarian and Estonian.

In Estonian, the commitative is formed by adding the suffix '-ga' to the genitive when the number is singular:

• Nina (name: "nariz") - Nina (genitive) - ninaga (comitative: "with a nose")
• koer (name: “dog”) - koera (genitive) - koeraga (comitative: "with a dog")

Furthermore, if the suffixes '-de' and '-ga' to the partitive in the plural:

• leht (name: "tree leaf, page") - lehte (partitive) - voluntary lehtedega (comitative: "with leaves")
• kass (name: «gato») - kassi (partitive) - voluntary kassidega (comitative: «with cats»)

In Estonian, the commitative is used when using an implement - kirvega ("with an ax / using an ax") or to denote transportation laevaga ("in boat").

In Quechua, the commitative is formed by adding the suffix "-wan" to the noun:

• Torowanmy Llamkasaq (I will work with my bull)

Similarly, the suffix "piwan" which accompanies the personal pronoun:

• Ñuqapiwanmy risun (we will go with me)