uncompromising

adj

1. Inflexible and unwilling to negotiate or make concessions.

   “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.”

   “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.”

   “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.”

   ““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.