unfaltering
131sedulous — I adjective active, adsiduus, alert, ardent, assiduous, attentive, avid, brisk, busily engaged, busy, conscientious, constant, diligent, dogged, eager, energetic, firm, hardworking, indefatigable, industrious, keen, laborious, painstaking,… …
132serious — I (devoted) adjective ardent, assiduous, decided, dedicated, determined, devout, dogged, dutiful, eager, earnest, faithful, fervent, firm, fixed, intent, loyal, passionate, purposeful, relentless, resolute, resolved, settled, sincere, steadfast,… …
