Is ἐν changing to ἐμ or ἐγ only a thing in Attic?

1. What does Ἐν mean?
2. How do you say me in Ancient Greek?
3. What are prepositions in Greek?

What does Ἐν mean?

Preposition. ἐν • (en) (governs the dative, genitive, and accusative) (location) (with dative) in, on, at; (with dative plural) among. (elliptical, with genitive) in the house or the land of. surrounded by; wearing quotations ▼

How do you say me in Ancient Greek?

From Ancient Greek με (me, “me”).

What are prepositions in Greek?

A Greek preposition (πρόθεσις) has the same definition and the same function as does its English counterpart. Prepositions are typically one to two syllable words that take a noun or pronoun as an object.