stalwart

nouns

a person who is loyal to their allegiance (especially in times of revolt)
loyalist, stalwart

adjectives

having rugged physical strength; inured to fatigue or hardships
"hardy explorers of northern Canada"; "proud of her tall stalwart son"; "stout seamen"; "sturdy young athletes"
hardy, stalwart, stout, sturdy
dependable
"the stalwart citizens at Lexington"; "a stalwart supporter of the UN"; "stout hearts"
stalwart, stout
is derived from
stalwartness
used especially of persons
"a stalwart knight"; "a stouthearted fellow who had an active career in the army"
stalwart, stouthearted