comitative case
Definition - A grammatical case used in languages such as Finnish and Estonian to show companionship.

1. In English this is accomplished by using the preposition with.

Example -
In Estonian the singular comitative is formed by adding the suffix -ga:

nina (nominative: nose) ---> ninaga (comitative: with a nose)

Etymology -
The term derives from the Latin comitare, to accompany.

Oxford English Dictionary -
Its first citation is from 1860:
"The declension of the personal pronouns is as follows.… Nominative , Genitive,…Comitative."
(Trans. Philol. Soc. 1857 34)

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