Late Middle English. From post-classical Latin occasionat-, past participial stem of occasionare to cause, occasion from classical Latin occāsiōn-, occāsiō.
Definition of occasionate in US English:
occasionate
verb
rare
with objectOccasion 2.
Origin
Late Middle English. From post-classical Latin occasionat-, past participial stem of occasionare to cause, occasion from classical Latin occāsiōn-, occāsiō.