Strong's G1505 · Greek

εἰλικρίνεια

heilikrineia · i-lik-ree'-ni-ah

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

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 3 ** εἰλικρινία (Rec., cl., -κρινεία ), -ας, ἡ ( εἰλικρινής ), [in LXX: Wi 7:25 A * ;] sincerity, purity : I Co 5:8 , II Co 1:12 2:17 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain