"Sir," he said, "I have behaved undutifully.
"Hetty Wesley"
Sir Arthur Thomas Quiller-Couch
If report is true he had a scolding wife-the name of Xanthippe has become a proverb-and yet what more noble than Socrates' rebuke to his son when he behaved undutifully towards his mother?
"Shadow Mountain"
Dane Coolidge
But he was painfully anxious to exculpate himself from the guilt of having acted undutifully and disrespectfully towards France.
"The History of England from the Accession of James II. Volume 1 (of 5)"
Thomas Babington Macaulay