arrérageassent third-person plural imperfect subjunctive of arrérager...
ʒa/ arrérageassions /a.ʁe.ʁa.ʒa.sjɔ̃/ arrérageassiez /a.ʁe.ʁa.ʒa.sje/ arrérageassent /a.ʁe.ʁa.ʒas/ (compound tenses) past present subjunctive of avoir +...