"to laugh," is found in Luke 6:21,25 . This signifies loud laughter in contrast to demonstrative weeping.
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; 18:12 , is not mentioned in the NT.