slavishly

with great effort or determination detectives slavishly devoted themselves to the case, pursuing every lead and tracking down every suspect Synonyms amain, arduously, assiduously, determinedly, diligently, doggedly, hardly, industriously, intensely, intensively, intently, laboriously, mightily, purposefully, resolutely, sedulously, hard, strenuouslyRelated Words actively, animatedly, briskly, busily, dynamically, energetically, feverishly, spiritedly, vehemently, vigorously, zealously; continuously, ploddingly, steadfastly, steadily, unabatedly, unrelentingly, unremittingly; ardently, attentively, conscientiously, earnestly, exhaustively, meticulously, painstakingly, seriously, thoroughly; indefatigably, tirelessly, unflaggingly, untiringly, wearilessly; obstinately, stubbornly, willfullyNear Antonyms casually, desultorily, halfheartedly, indolently, lackadaisically, languidly, lazily, listlessly, shiftlessly, sluggishly, spiritlessly, tiredly, wearily