Adjective hardline has 1 sense
  1. hard-line, hardline - firm and uncompromising; "a hard-line policy"
    Antonyms: compromising, conciliatory, flexible (indirect, via uncompromising)
,Noun hardliner has 1 sense
  1. hardliner - a conservative who is uncompromising
    --1 is a kind of
    conservative, conservativist
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