illuminate

(verb) make lighter or brighter. Synonyms: light, illume, illumine, light up. Examples: "This lamp lightens the room a bit."

(verb) make free from confusion or ambiguity; make clear. Synonyms: clear, clear up, shed light on, crystallize, crystallise, crystalize, crystalise, straighten out, sort out, enlighten, elucidate. Examples: "Could you clarify these remarks?." "Clear up the question of who is at fault."

(verb) add embellishments and paintings to (medieval manuscripts).