ἀνακαινίζω (anakainízō) is a Greek verb meaning:

1. To Renew: To make something new or refresh it.
2. To Renovate: To restore or update something to a better condition.

In biblical contexts, it often refers to a transformative renewal, particularly in a spiritual or moral sense.

Detailed Overview with Concordances

1. BDAG (A Greek-English Lexicon of the New Testament and Other Early Christian Literature):

• BDAG defines ἀνακαινίζω as “to renew” or “to renovate,” specifically focusing on the idea of making something new or improving it. It highlights the term’s use in theological contexts to describe the renewal of spiritual or moral conditions. For example, in Romans 12:2, it refers to the renewal of the mind as part of the transformative process of Christian living.

2. LSJ (Liddell-Scott-Jones Greek-English Lexicon):

• LSJ provides a definition for ἀνακαινίζω as “to renovate” or “to renew.” The lexicon emphasizes its usage in various Greek texts to denote the act of restoring or improving something, which aligns with its biblical application of spiritual renewal.

3. Thayer’s Greek Lexicon:

• Thayer describes ἀνακαινίζω as “to renew” or “to renovate,” with a focus on moral or spiritual renewal. Thayer explains that the term is used in the New Testament to signify a deep, transformative change, such as the renewal of the inner self in Ephesians 4:23.

4. Strong’s Concordance:

• Strong’s Concordance lists ἀνακαινίζω as G340 and defines it as “to renew” or “to renovate.” The concordance notes its application in the New Testament, particularly in passages like Hebrews 6:6, where it refers to the process of renewing one’s commitment or relationship with God.

Summary:
ἀνακαινίζω (anakainízō) means “to renew” or “to renovate” in Greek. According to BDAG, LSJ, Thayer’s Greek Lexicon, and Strong’s Concordance, it denotes the act of making something new or restoring it to a better condition, often with a focus on spiritual or moral transformation. In biblical texts, this term is used to describe the renewal of the mind, the inner self, or a person’s commitment to God, emphasizing a profound, transformative process.