The Collaborative International Dictionary
Prevenancy
Prevenancy \Prev"e*nan*cy\, n.
The act of anticipating another's wishes, desires, etc., in
the way of favor or courtesy; hence, civility; obligingness.
[Obs.]
--Sterne.
Wiktionary
prevenancy
n. (context obsolete English) The act of anticipate another's wishes, desires, etc., by way of favour or courtesy; obligingness.