adjective
steadfast
STED-fast/ˈstedfæst/
Firm and unwavering in loyalty or purpose.
The steadfast friend remains supportive throughout the uncomfortable wait in the rain.

Etymology
The pieces give the image of being firmly fixed in one's place. That physical stability became firmness in purpose or faith: someone steadfast remains loyal and unshaken.
In context
a steadfast friend of our parliament since its establishment in 1999
More examples
- Her steadfast loyalty never wavers.
- They remain steadfast despite repeated setbacks.
- She offers steadfast support throughout his recovery.
Forms
steadfast
Similar words
- unwavering
- Emphasizes the absence of hesitation or change.
- resolute
- Resolute is firmly determined; steadfast emphasizes continuing without wavering.