unyielding

 
Pronunciation: /ʌnˈjiːldɪŋ/

adjective

  • (of a mass or structure) not giving way to pressure; hard or solid: the Atlantic hurled its waves at the unyielding rocks
  • (of a person or their behaviour) unlikely to be swayed; resolute: his unyielding faith

Derivatives

unyieldingly

adverb

unyieldingness

noun