Never tiring or lacking energy; without rest; without slowing. His unflagging efforts have not gone unnoticed.
2008, Karlyn Kohrs Campbell, The Rhetorical Act: Thinking, Speaking and Writing Critically‎, The 2001 photo was strangely and powerfully similar to the World War II flag raising because both photos captured a heroic deed of courage, grit, teamwork, and unflagging patriotism at a historic moment marked by the darkness of the threat against us.
