"The term originated as an abstraction of the sequence: single, couple/double, triple, quadruple, quintuple, sextuple, septuple, octuple, ...,

n

‑tuple, …"

On 16 Feb 2021, at 10:10 PM, Steven D'Aprano <steve@pearwood.info> wrote:

And I still
don't know where the word comes from in the first place. Given that it
is used in maths, probably Latin, Greek or Arabic.