Why is it called egg?

Have you ever pondered over the question, "Why is it called egg?" It seems like a straightforward term, yet there's a deep-seated curiosity that lingers. Is it due to its shape, resembling an oval? Or perhaps it's because of the way it's produced, with its shell enclosing a yolk and white? Could there be cultural or historical reasons behind this nomenclature? Or is it simply a case of language evolving over time, with the term "egg" sticking as a common denominator? The mystery remains, but it's fascinating to delve into the origins of such commonplace terms. What do you think?