(of something bad or unpleasant) utter; complete (used for emphasis).
it’s a downright disgrace
to an extreme degree; thoroughly.
he was downright rude
thoroughly,utterly,positively,simply,profoundly,really,absolutely,completely,totally,entirely,perfectly,properly,consummately,surpassingly,unconditionally,unreservedly,categorically,incontrovertibly,unquestionably,undeniably,in every respect,through and through,outright,plain,clean