Strong’s Greek
G5396 — phluareo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
φλυαρέω
phluareo — pronounced floo-ar-eh'-o
from 5397; to be a babbler or trifler, i.e. (by implication) to berate idly or mischievously:--prate against. see GREEK for 5397
1 occurrence in the KJV.
3 John 1:10
Wherefore, if I come, I will remember his deeds which he doeth, prating against us with malicious words: and not content therewith, neither doth he himself receive the brethren, and forbiddeth them that would, and casteth them out of the church.