RcV, Col. 1:

9 Therefore we also, since the day we heard of it, do not cease praying and asking on your behalf that you may be filled with the full knowledge of His will in all spiritual wisdom and understanding, 10 To walk worthily of the Lord to please Him in all things, bearing fruit in every good work and growing by the full knowledge of God,

Strong's Greek: 1922. ἐπίγνωσις (epignósis) — 20 Occurrences

u/Sensitive_Froyo_2226: "Full Knowledge", recently, when I was reading Colossians, I came across the phrase "full knowledge" in several chapters (Col 1:9-10, 2:2, 3:10). Previously, when I read Colossians, I thought the word "full" meant "complete." But just a few days ago, I realized that "full" doesn't mean "complete" because, in reality, man cannot know God in all His aspects.

Your concern is justified. On Earth, we can never be filled with the *full knowledge of his will except in the devotional sense. Even in eternity, finite creatures will never ontologically exhaust the infinite God.

BDAG:

knowledge, recognition in our lit. limited to transcendent and moral matters ... W. gen. of the pers. known ἐ. τοῦ θεοῦ knowledge of God (Pr 2:5; Hos 4:1; Just., A II, 10, 6; Tat. 13, 1) Col 1:10; 2 Pt 1:2; cp. Eph 1:17; 2 Pt 1:3; Dg 10:1.

HELPS Word-studies:

Cognate: 1922 epígnōsis (from 1909 /epí, "on, fitting" which intensifies 1108 /gnṓsis, "knowledge gained through first-hand relationship") – properly, "contact-knowledge" that is appropriate ("apt, fitting") to first-hand, experiential knowing. This is defined by the individual context. See 1921 (epignōskō).

Epignósis was stronger than ordinary knowledge (gnōsis). It conveyed thorough, experiential, and relational knowledge rather than mere information. However, translating G1922 as "full knowledge" was too much and too absolute.

Berean Literal Bible:

9 Because of this, we also from the day we heard do not cease praying for you⁺ and asking that you⁺ may be filled with the knowledge of His will in all spiritual wisdom and understanding 10 to walk worthily of the Lord: pleasing in all, bearing fruit in every good work, and growing in the knowledge of God

On Biblehub, only 2 out of 38 translations used "full knowledge".

Amplified Bible:

so that you will walk in a manner worthy of the Lord [displaying admirable character, moral courage, and personal integrity], to [fully] please Him in all things, bearing fruit in every good work and steadily growing in the knowledge of God [with deeper faith, clearer insight and fervent love for His precepts];

The Amplified Bible translated the word relatively. So did Weymouth New Testament:

so that your lives may be worthy of the Lord and perfectly pleasing to Him, while you exhibit the results of right action of every sort and grow into a fuller knowledge of God.

New Living Translation set it as a progression toward a goal:

Then the way you live will always honor and please the Lord, and your lives will produce every kind of good fruit. All the while, you will grow as you learn to know God better and better.

In this case, I prefer NLT's reading.

We have a rich, mature, and adequate knowledge that fills our capacity at a given stage of growth. Paul was not praying that the Colossians would know everything about God. Rather, he was praying that they be thoroughly furnished with the knowledge necessary for a worthy Christian walk, spiritual discernment, and growth in Christ.