Arrantly

adv. [f. prec. + -LY².] Thoroughly (in a bad sense), notoriously, ‘abominably.’

a. 1600.  John Bon, 81, in Hazl., E. P. P., IV. 10. Ye sing so arantly well, ye make me fal a slepe.

1692.  L’Estrange, Fables, cccxi. 273 (J.). Funeral Tears are as Arrantly Hir’d-out as Mourning Cloaks.

1834.  Sir H. Taylor, Artevelde, II. V. iii. That is a heavy falling-off, my friends, And arrantly ill-timed.