A four letter word meaning not kosher is: tref
The word pine can have that meaning.
into
stop or halt is a four letter word meaning the opposite of go.
A four letter word meaning the foundation of something is base.
A four letter word meaning to grow light as the sun rises is dawn.
Grow
Fade
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?