Talking (vain, foolish) - Vine's Expository Dictionary of New Testament Words
Talking (vain, foolish)[ 1,,G3150, mataiologia ]
a noun corresponding to the above, is used in 1 Timothy 1:6, RV, vain talking" (AV, "vain jangling").
[ 2,,G3473, morologia ]
from moros, "foolish, dull, stupid," and lego, is used in Ephesians 5:4; it denotes more than mere idle "talk." Trench describes it as "that 'talk of fools' which is foolishness and sin together" (Syn. xxxiv).