This is the 6539th most frequent German word.
elli
The word "elli" does not have a standard definition in German; it may be a name, a colloquial term, or misspelled.
Here 'Elli' is used as a proper noun, specifically a person's name.
Elli ist eine sehr fleißige Studentin.
Elli is a very diligent student.
In this sentence, 'elli' functions as slang or an adjective to describe a clever or useful object.
Das ist ein elli Gerät, das alles vereinfacht.
This is a nifty (elli) device that simplifies everything.
In this context, 'Elli' is used as a common noun, referring to a small candle.