modus vivendi
From Longman Dictionary of Contemporary Englishmodus vivendimodus vi‧ven‧di /ˌməʊdəs vɪˈvendi $ ˌmoʊ-/ noun [singular] formalAGREE an arrangement between people with very different opinions or habits that allows them to live or work together without quarrellingExamples from the Corpusmodus vivendi• Like fanatics and zealots everywhere, they want to disrupt any attempts at a modus vivendi or reconciliation.• The old modus vivendi is fading, for ever.Origin modus vivendi (1800-1900) Latin “way of living”