accieris

acciēris

1. inflection of acciō:
   1. second-person singular future perfect active indicative
   2. second-person singular future passive indicative

accierīs

1. second-person singular perfect active subjunctive of acciō

• "accieris", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)