To condemn as heretical; to declare to be heresy; to treat as heretical.
From heretic (noun) + -ize (verb-forming suffix). The -ize suffix creates a verb meaning to make or treat as heretical, parallel to other -ize verbs like criticize or dramatize.
When you 'hereticize' an idea, you're not necessarily proving it wrong—you're using institutional power to declare it wrong, which is why so many ideas later proven correct were hereticized by their contemporaries.
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