moolah

The exact origin of 'moolah' is obscure, adding to its colloquial charm. The most plausible theory traces it to the Romani language, where a word related to mol signified value or worth, a concept naturally linked to currency. It entered American slang in the early 20th century, possibly reinforced by the association of mills (from French moulin) as traditional centers of industry and revenue. The word's playful, slightly irreverent sound helped it become a popular informal synonym for money, capturing the tangible yet often elusive nature of cash.

This word is a simplex loanword. Its origin is uncertain, but it is likely from Romani mol (meaning "to have value, to be worth"), with possible influence from French moulin (meaning "mill," as a source of wealth). Its functional role is as a monomorphemic noun.