She made an effort at casualness: "Let's see what Daddy's doing back there."
For all my manner of casualness, I knew that haste was necessary.
"Oh, anything you order," said Locuty with an effort at casualness.
Her preparation of Aunt Rosamund for the reception of Fiorsen was a masterpiece of casualness.
In peace, and especially in war, the young man's creed is casualness.