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"
the largest of the satellites of Saturn; has a hazy nitrogen atmosphere
(Greek mythology) any of the primordial giant gods who ruled the Earth until overthrown by Zeus; the Titans were offspring of Uranus (Heaven) and Gaea (Earth)
characterized by forceful and energetic action or activity; "a vigorous hiker"; "gave her skirt a vigorous shake"; "a vigorous campaign"; "a vigorous foreign policy"; "vigorous opposition to the war"
strong and active physically or mentally; "a vigorous old man who spent half of his day on horseback"- W.H.Hudson
having or showing great strength or force or intensity; "struck a mighty blow"; "the mighty logger Paul Bunyan"; "the pen is mightier than the sword"- Bulwer-Lytton
(Southern regional intensive) very; "the baby is mighty cute"; "he's mighty tired"; "it is powerful humid"; "that boy is powerful big now"; "they have a right nice place"
(Old Testament) a judge of Israel who performed herculean feats of strength against the Philistines until he was betrayed to them by his mistress Delilah
sturdy and strong in constitution or construction; enduring; "a rugged trapper who spent months in the wilderness"; "those that survive are stalwart rugged men"; "with a house full of boys you have to have rugged furniture"
very difficult; severely testing stamina or resolution; "a rugged competitive examination"; "the rugged conditions of frontier life"; "the competition was tough"; "it's a tough life"; "it was a tough job"
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"