nukenuke

To-Adverb

1. freely; impudently; brazenly; shamelessly; however one wishes

Usually Written in Kana
かれ自分 じぶん関与 かんよをぬけぬけと否定 ひていした。
karewa jibunno kan'yō nukenuketo hitē shita.
He had the impudence to deny his involvement.