Greek core word #233 · adjective · 67 times in the New Testament

πιστός

pis-TOS

πιστός, πιστή, πιστόν — faithful, believing

2-1-2 adjective with feminine in -η (πιστός, πιστή, πιστόν); oxytone.
Passive “faithful, trustworthy” or active “believing”; οἱ πιστοί “the believers”.

Forms in bold occur in the New Testament; the others complete the pattern. A dash (—) marks a form that does not exist.

	Masc. sg	Fem. sg	Neut. sg	Masc. pl	Fem. pl	Neut. pl
Nom	πιστός	πιστή	πιστόν	πιστοί	πισταί	πιστά
Gen	πιστοῦ	πιστῆς	πιστοῦ	πιστῶν	πιστῶν	πιστῶν
Dat	πιστῷ	πιστῇ	πιστῷ	πιστοῖς	πισταῖς	πιστοῖς
Acc	πιστόν	πιστήν	πιστόν	πιστούς	πιστάς	πιστά
Voc	πιστέ	πιστή	πιστόν	πιστοί	πισταί	πιστά

Where you meet it

First met in passage 118, 1 Peter 4:19.