Strong's #1505: eilikrineia (pronounced i-lik-ree'-ni-ah)

from 1506; clearness, i.e. (by implication) purity (figuratively):--sincerity.

Thayer's Greek Lexicon:

̓́

eilikrineia

1) purity, sincerity, ingenuousness

Part of Speech: noun feminine

Relation: from G1506

Citing in TDNT: 2:397, 206

Usage:

This word is used 3 times:

 

1 Corinthians 5:8: "but with the unleavened bread of sincerity and truth."
2 Corinthians 1:12: "simplicity and godly sincerity, not with fleshly wisdom,"
2 Corinthians 2:17: "but as of sincerity, but as of God,"