What is the word origin of abacus?

The word "abacus" comes from the Latin word "abacus," which itself is derived from the Greek word "abax" (ἄβαξ) meaning "counting board" or "table covered with dust."

Here's a breakdown of the etymology:

* Greek: ἄβαξ (abax) - counting board, table covered with dust

* Latin: abacus - counting board, table covered with dust

* English: abacus - a manual calculating device used for performing arithmetic calculations

It's interesting to note that the original meaning of "abax" referred to a surface used for drawing or calculating, often dusted with sand or chalk to create a temporary writing surface. This concept evolved into the physical calculating device we know as the abacus today.