unflagging

adj

1. Never tiring or lacking energy; without rest; without slowing.

   “His unflagging efforts have not gone unnoticed.”

   “He went on kissing her with unflagging industry, while she remained limply in his arms, in a species of satisfied trance.”

   “He writes of locomotive design, maintenance, passenger timetables, the structure of freight services, supervision and organisation, with unflagging enthusiasm, which comes across to us in a most readable book.”

   “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.”

   “His words mattered. He pledged “our unwavering and unflagging commitment to Ukraine’s democracy, sovereignty, and territorial integrity.””