seriously◼◼◼(in a serious or literal manner) adverb [UK: ˈsɪə.rɪə.sli] [US: ˈsɪ.riə.sli]Let's talk seriously. = Parlons sérieusement.
earnestly◼◻◻(in an earnest manner) adverb [UK: ˈɜː.nɪst.li] [US: ˈɝː.nəst.li]If you study earnestly, you can expect to pass the exam. = Si tu étudies sérieusement, tu devrais réussir l'examen.