arrant

adjective2

1. •
   (old-fashioned) Complete; downright; utter.

   • To a Nunnery goe, vve are arrant knaues all, / Beleeue none of vs, to a Nunnery goe. — 1599
2. •
   (old-fashioned) Very bad; despicable.

   • [W]ho so forward to accuse, to debase, to revile, to crow-treade an other as the arrantest fellow in a country? — 1593