flagrant

What it means

1. Obvious and offensive; blatant; scandalous.

   a flagrant, unforgivably outrageous disregard for human life

   1 more example

   'Tis certain, therefore, that in all our notions of morals vve never entertain ſuch an abſurdity as that of paſſive obedience, but make allovvances for reſiſtance in the more flagrant inſtances of tyranny and oppreſſion.

   1740, [David Hume], “Of the Measures of Allegiance”, in A Treatise of Human Nature: […], book III (Of Morals), London: […] Thomas Longman, […], →OCLC, part II (Of Justice and Injustice), pages 163–164

   Synonyms: blatant, glaring, gross

2. archaicOn fire; flaming.

   Synonyms: burning, flaming

In a sentence

a flagrant, unforgivably outrageous disregard for human life

Where it comes from

1. Latinflagrantem
2. Middle Frenchflagrant
3. Englishflagrant

From Middle French flagrant, from Latin flagrantem, present participle of flagrare (“blaze, burn”). More at black.