"cause (someone) to understand," c.1400, ensense, from Old French ensenser "to enlighten, to bring to sense," from en- "in" (see in- (2)) + sens (see sense (n.)). Restricted to Northern English dialect from 17c.
The King had been hard to insense (cause to understand: still a Northern provincialism) at the first.
Emily Sarah Holt
Well, we all sat down on a old motor chassis or what was left of it, and burned them smokes like insense, not speaking a word!
Nina Wilcox Putnam