ENLIGHTEN

clear, clear up, shed light on, crystallize, crystallise, crystalize, crystalise, straighten out, sort out, enlighten, illuminate, elucidate

(verb) make free from confusion or ambiguity; make clear; “Could you clarify these remarks?”; “Clear up the question of who is at fault”

enlighten, irradiate

(verb) give spiritual insight to; in religion

enlighten, edify

(verb) make understand; “Can you enlighten me--I don’t understand this proposal”

Source: WordNet® 3.1

Etymology

Verb

enlighten (third-person singular simple present enlightens, present participle enlightening, simple past and past participle enlightened)

(transitive) To supply with light.

Synonyms: illumine, illuminate, Thesaurus:illuminate

Antonym: endarken

(transitive, figurative) To make something clear to (someone); to give knowledge or understanding to.

Synonyms: apprise, notify, inform

Source: Wiktionary

En*light"en, v. t. Etym: [Pref. en- + lighten: cf. AS. inlihtan. Cf. Enlight.]

1. To supply with light; to illuminate; as, the sun enlightens the earth. His lightnings enlightened the world. Ps. xcvii. 4.

2. To make clear to the intellect or conscience; to shed the light of truth and knowledge upon; to furnish with increase of knowledge; to instruct; as, to enlighten the mind or understanding. The conscience enlightened by the Word and Spirit of God. Trench.

Source: Webster’s Unabridged Dictionary 1913 Edition