steadfast

/ˈstɛdˌfæst/

resolutely firm and unwavering

steadfast in a sentence

“She remained steadfast in her convictions despite pressure.”

Old English: stedefæst, stede (place) + fæst (firmly fixed)

Related Words

entrenched

firmly established and difficult to change

immutable

unchanging over time; unable to be changed

mutable

liable to change; inconstant

protean

tending to change frequently or easily; versatile

ossify

to turn into bone; to cease developing

calcify

to harden; to become rigid