uncompromising

From un- +‎ compromising.

uncompromising (comparative more uncompromising, superlative most uncompromising)

1. Inflexible and unwilling to negotiate or make concessions.
   • 1959, Georgette Heyer, chapter 1, in The Unknown Ajax:

     But Richmond, his grandfather's darling, after one thoughtful glance cast under his lashes at that uncompromising countenance appeared to lose himself in his own reflections.

   • 1971 December 19, B. J. Kahn Jr., “Twenty‐Four Titles for the World Traveler’s Book Bag”, in The New York Times‎^[1], New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 21 February 2018:

     THE WINDS CALL: Cruises Near and Far (Scribner’s, $8.95), and for over twenty years the winds have been calling Carleton Mitchell, and this is his grateful response—a collection of salty (or at any rate saline) autobiographical essays covering the peripatetic cruises of a man who lives on a boat and is an uncompromising sealubber.

   • 2014 November 14, Stephen Halliday, “Scotland 1-0 Republic of Ireland: Maloney the hero”, in The Scotsman‎^[2]:

     The visitors, who surprisingly dropped their talismanic record goalscorer Robbie Keane from their starting line-up for a competitive game for the first time in 13 years, adopted a direct and uncompromising approach.

   • 2022 October 6, Rob Picheta, “Annie Ernaux wins Nobel Prize in literature for her ‘uncompromising’ work on family, class and gender”, in CNN‎^[3]:

     “Her work is uncompromising and written in plain language, scraped clean,” Anders Olsson of the Swedish Academy said on Thursday as he announced her accolade.

2. Principled.

• See also Thesaurus:obstinate