Hebrews 6:4 For in the case of those who haveoncebeen enlightened,

PHOTIZOpart. ap to illuminate, make one see or understand, to enlighten, shine light upon

Psalm 119:130 The unfolding of Thy words gives light; It gives understanding to the simple.

2 Timothy 1:10 but now has been revealed by the appearing of our Savior Christ Jesus, who abolished death, and brought life and immortality to light[PHOTIZO] through the gospel,

Hebrews 10:32 But remember the former days, when, after being enlightened[PHOTIZO], you endured a great conflict of sufferings,

2 Corinthians 4:3-4 And even if our gospel is veiled, it is veiled to those who are perishing, 4) in whose case the god of this world has blinded the minds of the unbelieving, that they might not see the light [PHOTIZMOS] of the gospel. . .

Hebrews 6:4 … and havetasted of the heavenly gift [eternal salvation]…

 GEUOMAI part. ad (act) With the meaning to eat, partake, used in an absolute sense

Hebrews 2:9 … Jesus, because of the suffering of death crowned with glory and honor, that by the grace of God He might taste[GEUOMAI]death for everyone.

Hebrews 6:4 …and have been made partakers of the Holy Spirit,

METOCHOI adj. apm To partake. Partaking, participating. As a noun, a partaker, partner, companion, fellow worker

Hebrews 3:1 Therefore, holy brethren, partakers of a heavenly calling,

GINOMAI part. ad (act) To begin to be, to come into existence as implying origin (either from natural causes or through special agencies), result, change of state,

Hebrews 6:5 … and have tasted the good word of God…

 GEUOMAI part. ad (act)

Exactly the same as verse 4.

Hebrews 6:5 and the powers of the age to come,

Here the thought naturally applies to converts whose instruction in “the Word of God” had given them a genuine experience of its “goodness” and who likewise had known the reality of miracles. John F. Walvoord, Roy B. Zuck and Dallas Theological Seminary, The Bible Knowledge Commentary : An Exposition of the Scriptures

Hebrews 6:6 and then have fallen away,

PARAPIPTO part. aa

To fall aside or away, err, stray, lapse. Used only here in Heb. 6:6, denoting a falling away, an abandonment.

Remember the believers of Gal. 5:4 who were “severed from Christ” and had “fallen away from grace”?

Hebrews 6:4-6 For it is impossible in the case of those who have once been enlightened and have tasted of the heavenly gift and have been made partakers of the Holy Spirit, 5) and have tasted the good word of God and the powers of the age to come, 6) and have fallen away, to renew them again to repentance, as long as they continue

crucifying to themselves the Son of God, and put Him to open shame.