millage

The word 'millage' is a modern American English formation, created by combining the root 'mill-' from the Latin mille, meaning "thousand," with the noun-forming suffix '-age'. The suffix '-age' has a long history, evolving from Latin -aticum through Old French into English, where it commonly denotes a charge, rate, or aggregate amount. The logic of the word is therefore "a rate or charge per thousand," specifically per thousand units of currency. This meaning was directly applied to property tax rates in the United States, where it denotes the tax amount per thousand dollars of assessed property value. By extension, the term was later humorously or informally applied to the aggregate number of miles traveled by a vehicle, preserving the core concept of a quantity measured in thousands.

Structure: mill (thousand) + age (noun suffix) - mill: From Latin mille (thousand). In this word, it functions as a root meaning "thousand". - age: From Old French -age, from Latin -aticum (noun-forming suffix). In this word, it functions as a suffix that forms nouns indicating a charge, rate, or aggregate.