noun, feminine/ɑ̃.tʁə.miz/plural: entremises
entremise is feminine in French.
an intervention, means, or method
“Le nouveau suffixe «va permettre au Québec d'affirmer sa culture, son commerce, son talent et ses arts par l'entremise du Web»” — The new suffix "will allow Quebec to assert its culture, commerce, talent and arts via the Web"
From entremis.