/ ɪnˈlaɪtn; NAmE / verb
[ vn ] ( formal ) to give sb information so that they understand sth better :
She didn't enlighten him about her background.
► en·light·en·ing adjective :
It was a very enlightening interview.
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WORD ORIGIN
Middle English (in the sense make luminous ; formerly also as inlighten ): in early use from Old English inlīhtan to shine ; later from en- , in- (as an intensifier) + lighten become brighter or the noun light .