Strong’s Greek
G186 — aklines
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀκλινής
aklines — pronounced ak-lee-nace'
from 1 (as a negative particle) and 2827; not leaning, i.e. (figuratively) firm:--without wavering. see GREEK for 1 see GREEK for 2827
1 occurrence in the KJV.
Hebrews 10:23
Let us hold fast the profession of our faith without wavering; (for he is faithful that promised;)