Synonyms
Firmly, often unreasonably immovable in purpose or will
iron
resist
rigid
grim
stubborn
adamant
relentless
uncompromising
inflexible
inexorable
implacable
unyielding
unrelenting
remorseless
intransigent
obdurate
unbending
adamantine
unbendable
brassbound
Vehemently, often fanatically opposing progress or reform
Quiz
Words Related To die-hard