IPA: //ˈbleɪtəntli//
KK: /ˈbleɪtəntli/
In a way that is very obvious or clear, often in a way that is considered rude or disrespectful.
He blatantly ignored the rules during the game.
Blatantly is formed from "blatant" (from Latin "blatans", meaning to bleat or cry out) and the suffix "-ly" (meaning in a manner of). The word describes an action done in a manner that is loud, obvious, or conspicuous, akin to the loud cry of a bleating animal.
Think of something that is done in a very loud or obvious way, like the loud cry of an animal, to remember that 'blatantly' means in a very obvious manner.