hard-core

Adjective
  1. Stubbornly resistant to change or improvement (synset 301029225)
    "hard-core addicts"
    similar to: inflexible - incapable of change
  2. Intensely loyal (synset 300965214)
    "his hard-core supporters"
    similar to: loyal - steadfast in allegiance or duty
    same as: hardcore
  3. Extremely explicit (synset 300944644)
    "hard-core pornography"
    similar to: explicit, expressed - precisely and clearly expressed or readily observable; leaving nothing to implication
    same as: hardcore

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