Blatantly is used to add emphasis when you are describing states or situations which you think are bad.
例句
It became blatantly obvious to me that the band wasn't going to last...我觉得很明显该乐队长久不了。For years, blatantly false assertions have gone unchallenged...多年来,一些明显错误的断言都没有受到质疑。
英汉词典释义
adv.
公然地
blatantly contravening the rules of civilized warfare公然违反文明战争的原则Safety guidelines had been blatantly ignored.安全规章被公然置之不顾。