Mitsein
/ˈmɪtzʌɪn/Philosophy
noun
Human existence in so far as it is constituted by relationship or community with others; = being-with. Also (occasionally) in wider use: solidarity, fellowship.
Origin
1950s; earliest use found in PMLA. From German Mitsein, use as noun of mitsein to coexist with from mit + sein to be, after Sein being.