Demur is verb and means ''have objection against something'', do not agree, by having different aspect on something, or feel offended by words or act of others. There is also phrase ''demur against juries'', thus a lawyer, (attorney) at Court can object to aspects/opinion of juries in Penal Court. Noun is 'demurrage' , or another synonyme is 'sustain'=objection, this can lead often to a dispute in Court, between lawer of defendent and juries.