hardline

UK: /ˌhɑː^rdˈlaɪn/

WordReference Random House Learner's Dictionary of American English © 2025

ˈhard-ˈline or ˈhardˌline, adj. 

1. Government uncompromising;
   unyielding:
   hard-line union demands.

hard--lin•er, n. 

[countable] a hard-liner who would not give in to threats.

WordReference Random House Unabridged Dictionary of American English © 2025

hard′ line′, 

1. Government an uncompromising or unyielding stand, esp. in politics.

• 1965–70

hard-line  (härd′līn′), adj. 

1. Government adhering rigidly to a dogma, theory, or plan;
   uncompromising or unyielding:
   hard-line union demands.

Also, hard′line′. 

• 1960–65, American.

Collins Concise English Dictionary © HarperCollins Publishers::

hard line noun

1. an uncompromising course or policy

ˌhardˈliner noun