Decrease (Verb) - Vine's Expository Dictionary of New Testament Words
Decrease (Verb)[ 1,,G1642, elattoo ]
signifies to make less or inferior, in quality, position or dignity;" "madest ... lower" and "hast made ... lower," in Hebrews 2:7, Hebrews 2:9. In John 3:30, it is used in the Middle Voice, in John the Baptist's "I must decrease," indicating the special interest he had in his own "decrease," i.e., in authority and popularity. See LOWER.