A — 1: πειθός
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(Strong's #3981 — Adjective — peithos — pi-thos' )

an adjective (akin to peitho), not found elsewhere, is translated "persuasive" in 1—Corinthians 2:4 , RV (AV, "enticing"); see ENTICE , B.

B — 1: πιθανολογία
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(Strong's #4086 — Noun Feminine — pithanologia — pith-an-ol-og-ee'-ah )

"persuasiveness of speech," is used in Colossians 2:4 , RV. See ENTICE , B, Note.