Thoroughly
From BiblePortal Wikipedia
King James Dictionary [1]
Thoroughly adv. thur'roly. Fully entirely completely as a room thoroughly swept a business thoroughly performed. Let the matter be thoroughly sifted. Let every part of the work be thoroughly finished.
Webster's Dictionary [2]
(adv.) In a thorough manner; fully; entirely; completely.
Vine's Expository Dictionary of NT Words [3]
2—Corinthians 11:6