Smooth - Vine's Expository Dictionary of New Testament Words
Smooth
[ 1,,G3006, leois ]smooth," occurs in Luke 3:5, figurative of the change in Israel from self-righteousness, pride and other forms of evil, to repentance, humility and submission. In the Sept., Genesis 27:11; 1 Samuel 17:40; Proverbs 2:20; Proverbs 12:13; Proverbs 26:23; Isaiah 40:4.
Note: Chrestologia (chrestos, "good," lego, "to speak") is rendered "smooth ... (speech)," in Romans 16:18, RV (AV, "good words").