Laugh, Laugh to Scorn - Vine's Expository Dictionary of New Testament Words
Laugh, Laugh to Scorn[ 1,,G1070, gelao ]
to laugh," is found in Luke 6:21, Luke 6:25. This signifies loud laughter in contrast to demonstrative weeping.
[ 2,,G2606, katagelao ]
denotes "to laugh scornfully at," more emphatic than No. 1 (kata, "down," used intensively, and No. 1), and signifies derisive laughter, Matthew 9:24; Mark 5:40; Luke 8:53. Cp. ekmukterizo, "to deride."
Note: The laughter of incredulity, as in Genesis 17:17; Genesis 18:12, is not mentioned in the NT.