Regenerated means to be re-formed, to come into existence. The word is not in the scriptures, but it means to be reborn, as in the new birth. Regenerate means a born again believer, which is the only way that a person can believe in the things of the Spirit, according to 1 Cor 2:14.
“Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;”
Re= Again
generation = the act of generating, re-birth