From The Collaborative International Dictionary of English v.0.44 [gcide]:
3. True and constant in affection or allegiance to a person to whom one is bound by a vow, by ties of love, gratitude, or honor, as to a husband, a prince, a friend; firm in the observance of duty; loyal; of true fidelity; as, a faithful husband or servant.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
94 Moby Thesaurus words for "faithfully": absolutely, acquiescently, assiduously, bona fide, compliantly, consistently, constantly, dead, definitely, descriptively, devotedly, diligently, directly, doggedly, duteously, dutifully, even, exactly, expressively, expressly, firmly, graphically, in all respects, in compliance with, in conformity with, in every respect, in good faith, in obedience to, indefatigably, industriously, insistently, ipsissimis verbis, just, literally, literatim, loyally, naturalistically, obediently, patiently, perseveringly, persistently, persistingly, pertinaciously, ploddingly, plumb, point-blank, positively, precisely, realistically, relentlessly, representatively, resolutely, responsibly, right, rigidly, rigorously, sedulously, sloggingly, square, squarely, staunchly, steadfastly, steadily, straight, strictly, submissively, tenaciously, tirelessly, to the letter, unabatingly, undeviatingly, unerringly, unfalteringly, unflaggingly, unflinchingly, unintermittingly, uninterruptedly, unrelentingly, unremittingly, unrestingly, unsleepingly, unswervingly, untiringly, unwaveringly, unwearyingly, verbally, verbatim, verbatim et litteratim, vividly, wearilessly, willingly, with good faith, word by word, word for word
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