Antonym of dē?

I’m trying to understand Latin prepositions, and I think I’ve got a decent handle on most of them because they are similar to what they are in English.

ēx makes sense to me, it’s “out from” or “out of” in ablative, its antonym would be in, “into” in the accusative .

ab is “away from”, “all the way from” in the ablative, its antonym would be ad meaning “toward” in the accusative.

means “off of” or “away from” in the ablative, what would its antonym be?