This duplicates G3603, representing additional forms of the copular/existential verb εἰμί. The paradigm's extreme irregularity across dialects (Aeolic ἔμμι, Cretan ἠμί, Doric ἐντί, etc.) may account for multiple Strong's entries. The core meaning remains: existence, identity, possession, and the copular function linking subject and predicate. No verb is more essential to Greek grammar.