eutonos (Greek #2159)
in a well-strung manner, i.e. (figuratively) intensely (in a good sense, cogently; in a bad one, fiercely)
KJV usage: mightily, vehemently.
Pronounce: yoo-ton'-oce
Origin: adverb from a compound of 2095 and a derivative of τείνω (to stretch)