The Collaborative International Dictionary
Unfellow
Unfellow \Un*fel"low\, v. t. [1st pref. un- + fellow.] To prevent from being a fellow or companion; to separate from one's fellows; to dissever.
Death quite unfellows us.
--Mrs.
Browning.
Wiktionary
unfellow
vb. (context transitive English) To prevent from being a fellow or companion; to separate from one's fellows; to dissever.