τῑμωρ-ητέον · timōr-ēteon — LSJ
one must visit with vengeance, punish, τινας Isoc. 15.174; τι Pl. Lg. 867c.
τιμωρητέος, α, ον, that ought to be punished, ὑπὲρ ἁπάντων τ. ὡς κοινὸς ἐχθρός D. 21.142.
-ητέον one must assist, Hdt. 7.168: pl. τιμωρητέα, Th. 1.86.
one must defend, τῷ ἐναντίῳ λόγῳ Hp. Acut. 37.βʹ.