You use downright to emphasize unpleasant or bad qualities or behaviour.
例句
...ideas that would have been downright dangerous if put into practice...如果付諸實踐就會極度危險的想法She was often downright rude to him.她常對他十分粗魯。
英漢詞典釋義
adv.
完全地
That road is downright dangerous!那條路危險透頂！
adj.
徹底的, 完全的
He wasn’t just impolite—he was downright rude.他不僅僅是不禮貌，而是無禮透頂。His evidence was a blend of smears, half truths and downright lies.他的證詞里摻雜著誹謗、部份的事實和徹頭徹尾的謊言。
英英詞典釋義
Adjective
1. characterized by plain blunt honesty;
"a downright answer""a downright kind of person"
2. complete and without restriction or qualification; sometimes used informally as intensifiers;
"absolute freedom""an absolute dimwit""a downright lie""out-and-out mayhem""an out-and-out lie""a rank outsider""many right-down vices""got the job through sheer persistence""sheer stupidity"