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1650–60; originally < assumed Greek ���⳾��Dz���������ḗs (unattested), a derivative of ���⳾��Dz���á���𾱲� “to drink together” (with agentive suffix -��ŧ�� ), a verbal derivative of ���⳾��Dz�í�Dz� “drinking party” ( symposium ); in recent use probably recoinage: symposi(um) + -ast ( def )