δύσκολον

From LSJ

μεριμνᾷς καὶ τυρβάζῃ περὶ πολλά → you are worried and bothered about so many things, thou art careful and troubled about many things, you are worried and upset about many things

Source

Russian (Dvoretsky)

δύσκολον: τό Arst. = δυσκολία 3.