Dict: strongs - fiercely

Strongs:

G1264 @ διαμάχομαι diamachomai dee-am-akh'-om-ahee From G1223 and G3164; to fight fiercely (in altercation): - strive.

G2159 @ εὐτόνως eutonōs yoo-ton'-oce Adverb from a compound of G2095 and a derivation of τείνω teinō (to stretch); in a well strung manner that is (figuratively) intensely (in a good sense cogently; in a bad one fiercely): - mightily vehemently.