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The Collaborative International Dictionary
Improperation

Improperation \Im*prop`er*a"tion\, n. [L. improperare, improperatum, to taunt.] The act of upbraiding or taunting; a reproach; a taunt.

Improperatios and terms of scurrility.
--Sir T. Browne

Wiktionary
improperation

n. (context obsolete English) A reproach; an instance of upbraiding or contumely.