Found just one time in the New Testament (Eph. 6:19Eph. 6:19
English: American Standard Version (1901) - ASV
19 And on my behalf, that utterance may be given unto me in opening my mouth, to make known with boldness the mystery of the gospel,
WP-Bible plugin), the Greek noun “anoixis” meant “opening” or “the act of opening.”
When Paul spoke of “opening” his mouth, he was really referring to his speaking for the Lord (“that my mouth may be opened to proclaim,” Exegetical Dictionary of the New Testament, 1:106).