Comitative case
（重定向自Comitative）
The comitative case (abbreviated COM) is a grammatical case that denotes accompaniment. In English, the preposition "with", in the sense of "in company with" or "together with", plays a substantially similar role (other uses of "with", e.g. with the meaning of "using" or "by means of" (I cut bread with a knife), correspond to the instrumental case or related cases).