δυσεπιχείρητος
From LSJ
ἀρκετὸν τῇ ἡμέρᾳ ἡ κακία αὐτῆς → sufficient unto the day is the evil thereof, each day has enough trouble of its own, there is no need to add to the troubles each day brings (Matthew 6:34)
English (LSJ)
ον,
A hard to prove, πρόβλημα Arist.APr.42b31. 2 hard to attack, θέσις Id.Top.159a3; πρόβλημα ib.158b16: Sup. -ότατοι τῶν ὅρων ib. 158b8; of a person, J.BJ4.3.10, Plu.2.281a, App.Pun.118.
German (Pape)
[Seite 679] schwer anzugreifen, zu unternehmen, Arist. Topic. 8, 2, öfter, u. Sp.