First recorded before 1000.
Comes from the Middle English word stedefast, from Old English stedefæst.
A combination of stead, "the place of a person," and fast, "firmly fixed in place."
Sign up for more Word of the Day!

EXAMPLES OF STEADFAST

Despite facing numerous challenges, she remained steadfast in her commitment to finishing the marathon.
The community was grateful for the steadfast support of volunteers during the crisis.

It's National Poetry Month, and we’ve created a challenge that really is for everyone. Submit now!

Did you mean fideicommissary?