Third-person singular simple present indicative form of enlighten.(verb)
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Use "enlighteneth" in a sentence
"It is by means of the two newspapers that I am now conducting that I hope to do most toward opening the eyes of the people to the truth, and shedding upon them a knowledge of that true Light which enlighteneth the world."
"That was the true light, which enlighteneth every man that cometh into this world."
"This unlooseth all that is bound, enlighteneth darkness, mends that is broken, puts life to that which was desperately dying: makes no respect of offences, or of persons."