Definition of Earnest:

very enthusiastic

Synonyms of Earnest:

diligent, impassioned, sincere, fervent, urgent, purposeful, ardent, passionate, heartfelt, eager, keen, busy, devoted, fervid, industrious, sedulous, vehement, warm, wholehearted, zealous, perseverant

Opposite/Antonyms of Earnest:

thoughtless, frigid, cold, unenthusiastic, unexcited, cool, unimportant, trivial, unthoughtful, unconcerned, flippant, dispassionate, insincere, apathetic, indifferent

Sentence/Example of Earnest: