τιμωρητέον
From LSJ
English (LSJ)
A one must visit with vengeance, punish, τινας Isoc.15.174; τι Pl.Lg. 867c. II τιμωρητέος, α, ον, that ought to be punished, ὑπὲρ ἁπάντων τ. ὡς κοινὸς ἐχθρός D.21.142. III -ητέον one must assist, Hdt.7.168: pl. τιμωρητέα, Th.1.86. 2 one must defend, τῷ ἐναντίῳ λόγῳ Hp.Acut.37.β.