Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
ill-suited [ɪlˈsuːtɪd] adj
they are ill-suited они́ не подхо́дят друг к дру́гу
he is ill-suited to the job он не годи́тся для э́той рабо́ты
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.