Having the power or function of confirming; serving to confirm or give additional support to something.
From 'confirm' plus the suffix '-ative' (having the nature or function of). The '-ative' suffix comes from Latin '-ativus' and was originally used to describe properties or functions.
The suffix '-ative' often appears in psychological and scientific terminology ('comparative,' 'negative,' 'cumulative'), and it carries an interesting quality of describing something that *acts like* or *does* something rather than just being a certain way.
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