ἀκλινής G186
aklinḗs · ak-lee-nace' · Adjective
from Α (as a negative particle) and κλίνω; not leaning, i.e. (figuratively) firm:--without wavering.
1 Occurrence in the King James Bible
Hebrews 10:23Let us hold fast the profession of our faith without wavering; (for he is faithful that promised;)