πίστεις
Strong's 4102 (πίστις)
assurance, belief, believe, faith, fidelity
persuasion, i.e. credence; moral conviction (of religious truth, or the truthfulness of God or a religious teacher), especially reliance upon Christ for salvation; abstractly, constancy in such profession; by extension, the system of religious (Gospel) truth itself
from G3982 (πείθω);
Septuagint: found in
4 verses