GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 326 impudence (n) Insolent disrespect impudent (adj) disrespectful and shameless impugn (v) To assail with arguments, insinuations, or accusations impulsion (n) Impetus impulsive (adj) Unpremeditated impunity (n) Freedom from punishment impure (adj) Tainted imputation (n) to charge, to attribute a fault or misconduct to another