εὐτόνως
From LSJ
French (Bailly abrégé)
adv.
avec tension ; avec effort, avec vigueur.
Étymologie: εὔτονος.
English (Strong)
adverb from a compound of εὖ and a derivative of teino (to stretch); in a well-strung manner, i.e. (figuratively) intensely (in a good sense, cogently; in a bad one, fiercely): mightily, vehemently.