enlarge upon

Tessa ran back to her pansies; Mrs. Wadsworth had found a theme to enlarge upon for the next half hour.

He was permitted to enlarge upon it from time to time, and Hugh was not in the least surprised at his entering on it now.

Polish bravery is so universally recognised and admired that it is unnecessary to enlarge upon it.

I do not propose to enlarge upon the observations I have already submitted.

But the preacher was utterly relentless and proceeded to enlarge upon the character of the unhappy wretch.