enlighten in WordNet English dictionary

1. make free from confusion or ambiguity; make clear
   "Could you clarify these remarks?"; "Clear up the question of who is at fault"
   clear  clear up  shed light on  crystallize  crystallise  crystalize  crystalise  straighten out  sort out  enlighten  illuminate  elucidate 
   
2. make understand
   "Can you enlighten me--I don't understand this proposal"
   enlighten  edify 
   
3. give spiritual insight to; in religion
   enlighten  irradiate