Confute

Vine's Expository Dictionary of NT Words

1: Διακατελέγχομαι (Strong'S #1246 — Verb — diakatelenchomai — dee-ak-at-el-eng'-khom-ahee )

"to confute powerfully," is an intensive form of elencho, "to convict" (dia, "through," kata, "down," both intensive),  Acts 18:28 , implying that "he met the opposing arguments in turn (dia), and brought them down to the ground (kata)." It carries also the thought that he brought home moral blame to them.

Webster's Dictionary

(v. t.) To overwhelm by argument; to refute conclusively; to prove or show to be false or defective; to overcome; to silence.