For a great door and effectual is opened unto me, and [there are] many adversaries.
Berean Study Bible (BSB) - 1 Corinthians 16:9 >because a great door for effective work has opened to me, even though many oppose me.
Textus Receptus (TR) - 1 Corinthians 16:9 >θύρα γάρ μοι ἀνέῳγε μεγάλη καὶ ἐνεργής, καὶ ἀντικείμενοι πολλοί.