Earnestly adv. : In an earnest manner.

Example:
why are christians afraid to contend Earnestly for the faith?

Taxonomy
earnest, Merriam-Webster Online Dictionary, Dictionary, webster, ear, nest, Word Games, earnestly, Webster Online Dictionary with audio pronunciations, glossary, english, language, ESL, adjective, 12th century, proceeding, state of mind, synonyms.

Defination from the web:
earnest from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... earnest. One entry found. Main Entry: 2earnest. Function: adjective. Date: before 12th century. 1 : characterized by or proceeding from an ...