Shudder - Vine's Expository Dictionary of New Testament Words
Shudder[ 1,,G5425, phrisso ]
primarily, to be rough, to bristle," then, "to shiver, shudder, tremble," is said of demons, James 2:19, RV, "shudder" (AV, "tremble"). Cp. Matthew 8:29, indicating a cognizance of their appointed doom.