Suddenly the shadow of the screen wavered, pounced on the whole cornice, the whole ceiling; other shadows from the other side swooped to meet it, for an instant the shadows flitted back, but then with fresh swiftness they darted forward, wavered, commingled, and all was darkness.
There are no more uses of "commingle" in the book.
Show samples from other sources
His book commingles sarcasm and sadness.
But any activity that involved the commingling of the sexes—whether that was eating together, sharing cabins, or even passing one another on the way to the Washrooms—was strictly forbidden.