What is "insense"

Insense \In*sense"\, v. t. [Pref. in- in + sense.] To make to understand; to instruct. [Prov. Eng.]
--Halliwell.

"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.

vb. (context UK dialect English) To make to understand; to instruct.