Strong’s Greek
G3151 — mataiologos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ματαιολόγος
mataiologos — pronounced mat-ah-yol-og'-os
from 3152 and 3004; an idle (i.e. senseless or mischievous) talker, i.e. a wrangler:--vain talker. see GREEK for 3152 see GREEK for 3004
1 occurrence in the KJV.
Titus 1:10
For there are many unruly and vain talkers and deceivers, specially they of the circumcision: