manumission
act of slave owner freeing an enslaved person; or the enslaved person buying his/her own freedom; or another person buying the freedom of an enslaved person
en-US/ˌmænjəˈmɪʃən/
en-GB/ˌmænjʊˈmɪʃn/
act of slave owner freeing an enslaved person; or the enslaved person buying his/her own freedom; or another person buying the freedom of an enslaved person