S1344 dikaioō justified

Strong’s: “dik-ah-yo’-o”

KJV words (40x): justify 37, be freed 1, be righteous 1, justifier 1

From G1342, dikaios, to render (i.e. to show or regard as) just or innocent. Used for free, justify, and be righteous.

TDNT:

#1467, Vol. 2, pg. 211

The word díkaios gets its root meaning from díkē. “Apart from the variant in Ac 25.15, díkē occurs only three times in the NT, always for punishment. It is retributive justice in Ac 28.4, and eternal judgment in 2 Th 1.9 and Jude 7.”

General usage of díkaios in the Greek and Hellenistic world: “díkaios suggests conforming to custom, fulfilling obligations, observing legal norms. There is also an ethical use whereby díkē, having significance for the whole of life, relates to the four cardinal virtues....Both Josephus and Philo use díkaios to describe the OT saints and they can both say that God himself is díkaios... The word is also often used to describe things as ‘good’ ‘right,’ ‘legal,’ or ‘exact,’ correct’ and even ‘fertile’ (the earth).”

díkaios in the LXX: “The díkaios is the person who fulfills obligations to God and the theocratic society.”