εὐτόνως eutónōs

Meaning

in a well-strung manner, i.e. (figuratively) intensely (in a good sense, cogently; in a bad one, fiercely)

In the King James Version: mightily, vehemently

Derivation: adverb from a compound of G2095 (εὖ) and a derivative of (to stretch);

Where it is used

• Luke 23:10 Meanwhile, the chief priests and scribes stood there, vehemently accusing Him.
• Acts 18:28 For he powerfully refuted the Jews in public debate, proving from the Scriptures that Jesus is the Christ.