Strong's Greek #571
ἄπιστοι

Englishman's Concordance (References)

ἄπιστοι apistoi — 1 Occurrence

1 Corinthians 14:23 - Adj-NMP
GRK:ἰδιῶται ἢ ἄπιστοι οὐκ ἐροῦσιν
NAS: or unbelievers enter,
KJV: or unbelievers, will they
INT: uninstructed ones or unbelievers not will they say