Arrant

downright; thorough; unmitigated; notorious:
an arrant fool.
wandering; errant.
historical examples

accordingly, that dignified individual took an opportunity of remarking to the king that he considered the english arrant cowards.
how britannia came to rule the waves w.h.g. kingston

this arrant rogue was only a petty knave that any one could dupe.
samuel brohl & company victor cherbuliez

but the arrant low escaped without injury, and continued his career of contemptible crime for some time longer.
buccaneers and pirates of our coasts frank richard stockton

to doubt what they believed could only be ascribed to arrant folly or to wickedness.
the hero william somerset maugham

he was a tight brisk little man, with the air of an arrant old bachelor.
the sketch book of geoffrey crayon, gent. washington irving

an arrant traitor as any is in the universal world, or in france, or in england!
familiar quotations john bartlett

“yes, he did,” i said in disgust—for i was beginning to understand that billy and his magic seed were arrant frauds.
the story girl lucy maud montgomery

he preys only on the smallest quadrupeds, and with all his voracity he is an arrant poltroon.
the bush boys captain mayne reid

the “to let” sign on the little house was an arrant piece of hypocrisy.
rose o’ the river kate douglas wiggin

grena, i know not how it hath been with you, but for me, i have been an arrant coward.
all’s well emily sarah holt

adjective
utter; out-and-out: an arrant fool
adj.

late 14c., variant of errant (q.v.); at first merely derogatory, “wandering, vagrant;” then (1540s) acquiring a meaning “thoroughgoing, downright, notorious.”