Strong's Concordance G858

Original Word: ἀφελότης
Transliteration: aphelótēs
Phonetic Spelling: af-el-ot'-ace
[ἀφελότης] from a compound of G1 (as a negative particle) and φέλλος (in the sense of a stone as stubbing the foot); smoothness, i.e. (figuratively) simplicity

Usages throughout the bible

Acts 2:46 - And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness G858 of heart,