affranchise
Concise Oxford English Dictionary © 2008 Oxford University Press:
affranchise/əˈfran(t)ʃʌɪz/
▶verb archaic release from servitude.
– origin C15: from OFr. afranchiss-, lengthened stem of afranchir, from a- (from L. ad ‘to, at’) + franc ‘free’.
'affranchise' also found in these Oxford entries:

