That God would open to us a door of utterance — That is, give us utterance, that we "may open our mouth boldly," Ephesians 6:19, and give us an opportunity of speaking, so that none may be able to hinder.
Related Commentaries of Colossians 4:3
Colossians 4:3
3 Withal praying also for us, that God would open unto us a door of utterance, to speak the mystery of Christ, for which I am also in bonds: