Steadfast is a derived term of steadfastness.
As a noun steadfastness
is loyalty in the face of trouble and difficulty.
As an adjective steadfast is
fixed or unchanging; steady.
steadfastness
English
Noun
Loyalty in the face of trouble and difficulty.
Steadfast resolution.
steadfast
English
Alternative forms
* stedfast (obsolete)
Adjective
(en-adj)
Fixed or unchanging; steady.
Firmly loyal or constant; unswerving.
Derived terms
* steadfastly
* steadfastness