出典:Wiktionary
From Renaissance or New Latin mastuprari, an alternation of classical Latin masturbārī influenced by stuprō (“defile”). See also mastupration. Attested in English from the late 16th century.
mastuprate (三人称単数 現在形 mastuprates, 現在分詞 mastuprating, 過去形および過去分詞形 mastuprated)