From the base of pletho; wealth (as fulness), i.e. (literally) money, possessions, or (figuratively) abundance, richness, (specially), valuable bestowment -- riches.
see GREEK pletho
a. properly, and absolutely, abundance of external possessions: Matthew 13:22; Mark 4:19; Luke 8:14; 1 Timothy 6:17; James 5:2; Revelation 18:17 (16).
b. universally, fullness, abundance, plenitude: with a genitive of the excellence in which one abounds, as τῆς χρηστότητος, Romans 2:4; Romans 9:23; 2 Corinthians 8:2; Ephesians 1:7, 18; Ephesians 2:7; Ephesians 3:16; Colossians 1:21; Colossians 2:2. the πλοῦτος of God is extolled, i. e. the fullness of his perfections — of which two are mentioned, viz. σοφία and γνῶσις, Romans 11:33 (for σοφίας καί γνώσεως here depend on βάθος, not on πλούτου (cf. B. 155 (135); Winer's Grammar, § 30, 3 N. 1)); the fullness of all things in store for God's uses, Philippians 4:19; in the same sense πλοῦτος is attributed to Christ, exalted at the right hand of God, Revelation 5:12; in a more restricted sense, πλοῦτος τοῦ Χριστοῦ is used of the fullness of the things pertaining to salvation with which Christ is able to enrich others, Ephesians 3:8.
c. universally equivalent to a good ((to point an antithesis)): Hebrews 11:26; equivalent to that with which one is enriched, with a genitive of the person enriched, used of Christian salvation, Romans 11:12.