absorbedly, advertently, ardently, assiduously, attentively, closely, continuously, determinedly, devotedly, devoutly, doggedly, eagerly, earnestly, engrossedly, fervently, fervidly, fixedly, heartily, heatedly, heedfully, impassionedly, intensely, interestedly, keenly, mindfully, observantly, passionately, perfervidly, preoccupiedly, raptly, regardfully, seriously, sharply, sincerely, steadfastly, steadily, studiously, unflinchingly, unremittingly, vehemently, with attention, with interest, with rapt attention, with undivided attention, without distraction, zealously