(comparative more impacable, superlative most impacable)
Latin prefix im- not + pacare to quiet. See pacate.
"impacable." YourDictionary, n.d. Web. 05 December 2018. <https://www.yourdictionary.com/impacable>.
impacable. (n.d.). Retrieved December 05th, 2018, from https://www.yourdictionary.com/impacable
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