Definition of diehard in English:

diehard

Line breaks: die|hard
Pronunciation: /ˈdʌɪhɑːd
 
/

noun

[often as modifier]
A person who strongly opposes change or who continues to support something in spite of opposition: my stepfather was a diehard Republican a diehard Yankees fan
More example sentences
  • With the support from their diehard fans, Rangers are confident they are really set for something big this season.
  • It became the home of the most diehard opposition to colonialism in the Arab world.
  • They have no chairman, no money and only a few hundred diehard supporters who turn up more in hope than expectation.
Synonyms
hard-line, hard-core, reactionary, ultra-conservative, conservative, traditionalist, unprogressive, dyed-in-the-wool, deep-dyed, long-standing, staunch, steadfast, intransigent, inflexible, immovable, unchanging, uncompromising, unyielding, indomitable, adamant, rigid, entrenched, set in one's ways
informal blimpish
hardliner, reactionary, ultra-conservative, conservative, traditionalist, intransigent; fanatic, zealot

Origin

mid 19th century: from die hard (see die1).

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