2 in Latin
number 2 translates to the word duo. The Latin word 'duo' is often
found in modern day use.
The definition of a duo is a
musical composition for two performers. The word is also used to
describe a pair who associate with one another, especially in a
comedy duo such as Laurel and Hardy.
A duet derives from this word
meaning a composition for two performers.
It can also refer to two separate
items of the same kind.