[adverb] in a serious manner; "talking earnestly with his son"; "she started studying snakes in earnest"; "a play dealing seriously with the question of divorce" Synonyms:seriously, earnestly
[adjective] characterized by a firm and humorless belief in the validity of your opinions; "both sides were deeply in earnest, even passionate"; "an entirely sincere and cruel tyrant"; "a film with a solemn social message" Synonyms:earnest, sincere, solemn