The Greek word for "repent" is "metanoia" (noun) and "matanoeo" (verb) you see as defined in the Strongs #3340, 3341:
to think differently or afterwards, reconsider. To change one's mind.
https://www.bibletools.org/index.cfm/fuseaction/Lexicon.show/ID/G3340/metanoeo.htm#:~:text=Strong's #3340: metanoeo (pronounced met-an-o-eh'-o) from 3326 and,i.e. reconsider (morally, feel compunction):--repent. Thayer's Greek Lexicon:
Repentance basically means a "change of mind" and the context must determine what is involved in this change of mind. Where salvation is in view, repentance actually precedes saving faith in Christ and is not a totally separate act from faith. It is actually the same coin with two sides. Repentance is on one side (what you change your mind about) and faith in Christ is on the positive side, the new direction of this change of mind. Repentance and faith are two sides of the same experience of receiving Christ. (
Acts 20:21)
Certain people misunderstand the term "repentance" to mean "turning from sin" which then redefines repentance as "moral self-reformation" and flirts with sinless perfection. I have heard certain people say, "if you want to be saved, repent of your sins, turn from your sins." If turning from your sins means to completely stop sinning, then people can only be saved if they completely stop sinning and, in that case, none of us will be saved because none of us are sinless, without fault or defect, flawless, 100% of the time. (
1 John 1:8-10)
The Bible also tells us that true repentance will result in a change of actions.
Acts 26:20 declares, "I preached that they should repent and turn to God and prove their repentance by their deeds." This is the fruit of repentance (
Matthew 3:8), not the essence of repentance (change of mind). Certain folks confuse the fruit of repentance with the essence of repentance and the end result is works salvation.