Multiply - Vine's Expository Dictionary of New Testament Words
Multiply
[ 1,,G4129, plethuno ]used
(a) transitively, denotes to cause to increase, to multiply," 2 Corinthians 9:10; Hebrews 6:14 (twice); in the Passive Voice, "to be multiplied," Matthew 24:12, RV, "(iniquity) shall be multiplied" (AV, "shall abound"); Acts 6:7; Acts 7:17; Acts 9:31; Acts 12:24; 1 Peter 1:2; 2 Peter 1:2; Jude 1:2;
(b) intransitively it denotes "to be multiplying," Acts 6:1, RV, "was multiplying" (AV, "was multiplied"). See ABUNDANCE, B, No. 5.
[ 2,,G4121, pleonazo ]
used intransitively, "to abound," is translated "being multiplied" in the RV of 2 Corinthians 4:15 (AV, "abundant"); the Active Voice, aorist tense, here would be more accurately rendered "having superabounded" or "superabounding" or "multiplying." See ABUNDANCE, B, No. 3.