akin to stomachos (which originally meant "a throat, gullet"), is used (a) of "the mouth" of man, e.g., Matthew 15:11; of animals, e.g., Matthew 17:27; 2 Timothy 4:17 (figurative); Hebrews 11:33; James 3:3; Revelation 13:2 (2nd occurrence); (b) figuratively of "inanimate things," of the "edge" of a sword, Luke 21:24; Hebrews 11:34; of the earth, Revelation 12:16; (c) figuratively, of the "mouth," as the organ of speech, (1) of Christ's words, e.g., Matthew 13:35; Luke 11:54; Acts 8:32; 22:14; 1 Peter 2:22; (2) of human, e.g., Matthew 18:16; 21:16; Luke 1:64; Revelation 14:5; as emanating from the heart, Matthew 12:34; Romans 10:8,9; of prophetic ministry through the Holy Spirit, Luke 1:70; Acts 1:16; 3:18; 4:25; of the destructive policy of two world potentates at the end of this age, Revelation 13:2,5,6; 16:13 (twice); of shameful speaking, Ephesians 4:29; Colossians 3:8; (3) of the Devil speaking as a dragon or serpent, Revelation 12:15,16; 16:13; (d) figuratively, in the phrase "face to face" (lit., "mouth to mouth"), 2 John 1:12; 3 John 1:14; (e) metaphorically, of "the utterances of the Lord, in judgment," 2 Thessalonians 2:8; Revelation 1:16; 2:16; 19:15,21; of His judgment upon a local church for its lukewarmness, Revelation 3:16; (f) by metonymy, for "speech," Matthew 18:16; Luke 19:22; 21:15; 2 Corinthians 13:1 .

Note: In Acts 15:27 , logos, "a word," is translated "word of mouth," RV (AV, "mouth," marg., "word").

B — 1: ἐπιστομίζω

(Strong's #1993 — Verb — epistomizo — ep-ee-stom-id'-zo )

"to bridle" (epi, "upon," and A), is used metaphorically of "stopping the mouth, putting to silence," Titus 1:11 . Cp. phrasso, "to stop, close," said of stopping the "mouths" of men, in Romans 3:19 . See STOP.

Bibliography Information
Vines, W. E., M. A. Entry for 'Mouth'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/dictionaries/eng/ved/m/mouth.html. 1940.

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Vine's Expository Dictionary of NT Words

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Mouth