Comitative Case

The comitative case (abbreviated COM), also known as the associative case (abbreviated ASS), is a grammatical case that denotes companionship, and is used where English would typically use preposition "with" in the sense of "in company with" or "together with" (other uses of "with," e.g. with the meaning of "using," "by means of" (I cut bread with a knife) would correspond to the instrumental case or related cases). Among other languages, it is found in Korean, Finnish, Hungarian, Mongolian, Estonian, Japanese and many Australian Aboriginal languages. In Portuguese and Spanish, some personal pronouns merged with the preposition with (com in Portuguese and con in Spanish) to form what can be considered as comitative case declensions of the pronouns.