Characterized by extremely brutal or cruel crimes; vicious.
Infamous; scandalous: "That remorseless government persisted in its flagitious project"(Robert Southey).
[Middle English flagicious, wicked, from Latin flāgitiōsus, from flāgitium, shameful act, protest, from flāgitāre, to importune, to demand vehemently.] fla·gi'tious·ly adv., fla·gi'tious·ness n.