Noah Webster's Dictionary (adv.) In a desperate manner; without regard to danger or safety; recklessly; extremely; as, the troops fought desperately.

Multi-Version Concordance Desperately (2 Occurrences) Jeremiah 17:9 The heart is deceitful above all things, and desperately wicked: who can know it? (KJV WBS NAS RSV) Jonah 1:13 Nevertheless the men rowed hard to get them back to the land; but they could not, for the sea grew more and more stormy against them. (See NAS)