The adjective flagrant means an action, situation, or someone’s behaviour that you find extremely bad or shocking in a very obvious way.

Synonyms are flaunting, blatant, atrocious, or heinous.

The word origins from Latin (15th century) flagrantem meaning “burning, blazing, glowing”, figuratively “glowing with passion, eager, vehement”, present participle of flagrare meaning “to burn, blaze, glow” from Proto-Italic flagro– meaning “burning”.

I’m not surprised by the most flagrant and outrageous use of her government position.

That flagrant breach of the treaty shouldn’t be allowed.

She should be punished for her flagrant violation of the student’s privacy.