Strong's #2236: hedista (pronounced hay'-dis-tah)
neuter plural of the superlative of the same as 2234; with great pleasure:--most (very) gladly.
Thayer's Greek Lexicon:
̔́
hēdista
1) most gladly
Part of Speech: adverb
Relation: plural of the superlative of the same as G2234
Usage:
This word is used 2 times:
2 Corinthians 12:9: "is made perfect in weakness. Most gladly therefore will I rather glory in"
2 Corinthians 12:15: "And I will very gladly spend and be spent for you;"