Oh Boy! A word study....!
Wrong again! The Only one that is Pertinent to Salvation Is the one that is used in the actual scripture. Acts 2:28 Peter said to them, "Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit.
Strong's Exhaustive Concordance....3340 From the actual book
μετανοέω pronounced metanoéō
Definition: to think differently or afterwards, i.e. reconsider (morally, feel compunction)
From 3326 and 3539
μετανοέω from the Abbott and Smith Lexicon
G3340
Occurrences in the NT: 34
μετα-νοέω, -ῶ,
[in LXX for נחם ni., I Ki 15:29, Je 4:28, al.;]
to change one's mind or
purpose, hence,
to repent; in NT (exc. Lk 17:3, 4), of repentance from sin, involving amendment: seq. ἀπό, Ac 8:22; ἔκ, Re 2:21, 22 9:20, 21 16:11 (מִן שׁוּב); ἐπί, II Co 12:21; absol., Mt 3:2 4:17 11:20 12:41, Mk 1:15 6:12, Lk 11:32 13:3, 5 15:7, 10 16:30 17:3, 4, Ac 2:38 3:19 17:30 26:20 Re 2:5, 16, 21 3:3, 19; c. inf., Re 16:9; ἐν σάκκῳ κ. σποδῷ, Mt 11:21, Lk 10:13.†
SYN.: μεταμέλομαι, q.v.
Reading comprehension? If you have issues with that, I can help with that also.
Forgiveness of sins require repentance....the "safety valve" for those that would abuse Grace is the lack of sorrow, the failure to change one's actions. Getting forgiveness for "a" sin is different than thinking you can live like you want and get your bread buttered perpetually.