never-tiring - Wordage.info - Free Thesaurus Tool for Word Discovery - Expanded Thesaurus, Reverse Dictionary Lookup

exhausting collapse: producing exhaustion; "an exhausting march"; "the visit was especially wearing"

strenuous collapse: characterized by or performed with much energy or force; "strenuous exercise"

punishing collapse: resulting in punishment; "the king imposed a punishing tax"

boring collapse: the act of drilling a hole in the earth in the hope of producing petroleum; so lacking in interest as to cause mental weariness; "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldn't capture their attention"; "what an irksome task the writing of long letters is"- Edmund Burke; "tedious days on the train"; "the tiresome chirping of a cricket"- Mark Twain; "other people's dreams are dreadfully wearisome"

arduous collapse: difficult to accomplish; demanding considerable mental effort and skill; "the arduous work of preparing a dictionary"; characterized by toilsome effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"; taxing to the utmost; testing powers of endurance; "his final, straining burst of speed"; "a strenuous task"; "your willingness after these six arduous days to remain here"- F.D.Roosevelt

undaunted collapse: resolutely courageous; "undaunted in the face of death"; unshaken in purpose; "wholly undismayed by the commercial failure of the three movies he had made"

indefatigable collapse: showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence"

unconquerable collapse: not capable of being conquered or vanquished or overcome; "a tribute to his courage...and his unconquerable will"- R.E.Danielson; "faced unconquerable difficulties"

assiduous collapse: marked by care and persistent effort; "her assiduous attempts to learn French"; "assiduous research"; "sedulous pursuit of legal and moral principles"

draining collapse: having a debilitating effect; "an exhausting job in the hot sun"

unfailing collapse: unceasing; "unfailing loyalty"; "unfailing good spirits"; "unflagging courtesy"; always able to supply more; "an unfailing source of good stories"; "a subject of unfailing interest"

dogged collapse: stubbornly unyielding; "dogged persistence"; "dour determination"; "the most vocal and pertinacious of all the critics"; "a mind not gifted to discover truth but tenacious to hold it"- T.S.Eliot; "men tenacious of opinion"

diligent collapse: characterized by care and perseverance in carrying out tasks; "a diligent detective investigates all clues"; "a diligent search of the files"; quietly and steadily persevering especially in detail or exactness; "a diligent (or patient) worker"; "with persevering (or patient) industry she revived the failing business"

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