βλαβερῶς
From LSJ
πρέπει γὰρ τοὺς παῖδας ὥσπερ τῆς οὐσίας οὕτω καὶ τῆς φιλίας τῆς πατρικῆς κληρονομεῖν → it is right that children inherit their fathers' friendships just as they would their possessions
French (Bailly abrégé)
adv.
d'une manière nuisible.
Étymologie: βλαβερός.
Spanish
Russian (Dvoretsky)
βλᾰβερῶς: причиняя вред, нанося ущерб Plat., Plut.