earnestとは何ですか?Marked by or showing deep sincerity or seriousness: an earnest gesture of goodwill. Of an important or weighty nature; grave. See Synonyms at serious.in earnest With a purposeful or sincere intent: settled down to study in earnest for the examination. in earnest Serious; determined: "Both sides are deeply in earnest, with passions that approximate those of civil war” ( Conor Cruise O'Brien). Money paid in advance as part payment to bind a contract or bargain.A token of something to come; a promise or an assurance.