This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of enlighten.

adj. enlightening so as to encourage intellectual or moral improvement.

adj. tending to increase knowledge or dissipate ignorance.

adj. tending to increase knowledge or dissipate ignorance

adj. enlightening or uplifting so as to encourage intellectual or moral improvement

"Also most enlightening, is to see how local champions of "Green" living and public transportation, who advocate and even legislate with every fiber of their being to get vehicles such as large white GMC pickups off the road, live and work in the same manner as they demand of their constituents."

edifying   

enlighten   

brightening    frightening    heightening    lightening    lightning