stalwart

adjective stal·wart \ˈstȯl-wərt\

: very loyal and dedicated

: physically strong

Full Definition of STALWART

: marked by outstanding strength and vigor of body, mind, or spirit <stalwart common sense>

— stal·wart·ly adverb

— stal·wart·ness noun

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their strong and stalwart son
<the stalwart soldiers in the army of Alexander the Great, who willingly followed him to the ends of the known world>

Middle English, alteration of stalworth, from Old English stǣlwierthe serviceable

First Known Use: 15th century