A four letter word meaning to grow light as the sun rises is dawn.
Grow
gain, rise
Dawn is the four letter word meaning to grow light as the sun rises. Dawn is the beginning of a new day.
dawn
d for dawn
d for dawn
d for dawn
d for dawn
A four letter word meaning not kosher is: tref
The word is Dawn. Its first letter is "d" and its last letter is "n." Note that dawn can be either a noun or a verb.
cultivate?