"Mitigative" is a word in ENGLISH

mitigative ENGLISH
Definition:

Tending to mitigate; alleviating.

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lenitive ENGLISH

That which softens or mitigates; that which tends to allay passion, excitement, or pain; a palliative.

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mitigant ENGLISH

Tending to mitigate; mitigating; lentitive.

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mitigatory ENGLISH

Tending to mitigate or alleviate; mitigative.

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