I. adjective
also sted·fast ˈstedˌfast, -aa(ə)st, -aist, -ȧst also -_fəst
Etymology: Middle English stedefast, from Old English stedefæst, from stede place, stead + fæst fast, fixed
1.
a. : firmly established : fixed in place or position : immovable
a castle, steadfast among storms — Sinclair Lewis
b. : not subject to change : immutable
the most steadfast of primitive environments, the ocean — Lewis Mumford
the steadfast doctrine of original sin — Ellen Glasgow
2. : marked by unwavering steadiness : firm in belief, determination, or adherence : loyal , unswerving
our steadfast friend, in peace or war, for many years — H.G.Doyle
narrow of vision but steadfast to principles — Agnes Repplier
Synonyms: see faithful
II. adverb
Etymology: Middle English stedefast, from stedefast, adj
: steadfastly