ˌ ̷ ̷ ̷ ̷ˈmishən noun
Etymology: Middle English, from Middle French, from Latin manumission-, manumissio, from manumissus (past participle of manumittere ) + -ion-, -io -ion
: the act or process of manumitting ; especially : formal emancipation from slavery
was true to his profession of humanitarian and liberal principles and advocated the manumission of the slaves — A.L.Harris