commisero

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

com-mĭsĕro, ōnis, m. [miser],

a companion in misfortune (post-class.), Tert. adv. Marc. 4, 9, as transl. of Gr. συνταλαίπωρος; id. ib. 4, 37.