Where did the word sphere come from?

The word "sphere" has a fascinating history, tracing back to ancient Greek roots:

* Greek: The word "sphere" comes from the Greek word σφαῖρα (sphaira), meaning "ball" or "globe".

* Latin: The Latin word sphaera was adopted from Greek, and it carried the same meaning.

* English: The English word "sphere" entered the language through Old French (esphere), ultimately derived from the Latin sphaera.

So, the journey of the word "sphere" is a story of linguistic inheritance, travelling from ancient Greece through Latin and Old French to its present-day usage in English.