(third-person singular simple present impens, present participle impenning, simple past and past participle impenned)
im- + pen
"impen." YourDictionary, n.d. Web. 22 June 2018. <http://www.yourdictionary.com/impen>.
impen. (n.d.). Retrieved June 22nd, 2018, from http://www.yourdictionary.com/impen
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