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"
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"
firm in purpose or belief; characterized by firmness and determination; "stood resolute against the enemy"; "faced with a resolute opposition"; "a resolute and unshakeable faith"
having been learned or found or determined especially by investigation
characterized by great determination; "a struggle against a determined enemy"
determined or decided upon as by an authority; "date and place are already determined"; "the dictated terms of surrender"; "the time set for the launching"
devoting full strength and concentrated attention to; "made continued and determined efforts to find and destroy enemy headquarters"