/ ˈstedfɑːst; NAmE -fæst/ adjective
steadfast (in sth) ( literary , approving ) not changing in your attitudes or aims
SYN firm :
steadfast loyalty
He remained steadfast in his determination to bring the killers to justice.
► stead·fast·ly adverb
► stead·fast·ness noun [ U ]
••
WORD ORIGIN
Old English stedefæst standing firm (see stead and fast firm ).