Strong's #226: aletheuo (pronounced al-ayth-yoo'-o)

from 227; to be true (in doctrine and profession):--speak (tell) the truth.

Thayer's Greek Lexicon:

̓́

alētheuō

1) to speak or tell the truth

1a) to teach the truth

1b) to profess the truth

Part of Speech: verb

Relation: from G227

Citing in TDNT: 1:251, 37

Usage:

This word is used 2 times:

 

Galatians 4:16: "become your enemy, because I tell you the truth?"
Ephesians 4:15: "But speaking the truth in love, may grow up into him in all things,"