the.com/steadfast
Loyalty with its feet bolted to the floor, immune to weather and whining.
means Firmly and unwaveringly committed to a person, belief, or course no matter the pressure.
from Old English stedefaest, literally fixed in place — stede (place, as in stead) plus faest (firm, as in fast). A loyalty so old it predates the spelling of loyalty.
Same fastThe fast in stuck fast, not in speed.
Original useFirst described a soldier holding his ground in battle.
Cousin wordHomestead and instead share that anchoring stede root.