Quote Originally Posted by it-ogo View Post
"бесцеремонно" (= "без церемоний")

может быть "недвусмысленно"

still I don't understand the sample phrase
Well, a simpler one "he spoke unapologetically in the interview"

недвусмысленно and бесцеремонно are not bad, but I guess just like the word "challenging" you just don't have a word for "unapologetically" in Russian. Maybe because being unapologetic in a constant state for Russians