madam

the word 'madam' entered english in the 13th century from the old french phrase 'ma dame', meaning literally 'my lady'. this itself was derived from the latin 'mea domina', where 'mea' is 'my' and 'domina' is the feminine form of 'lord' or 'master', meaning 'mistress of the household'. the term was originally a respectful title for a woman of rank, equivalent to 'madame'. over time, its usage broadened into a general polite form of address for any woman, while also developing a specialized, contrasting meaning for the woman in charge of a brothel, illustrating a semantic shift from high respect to a specific, often illicit, authority.

this word is a loanword and a fixed polite form of address. it does not lend itself to segmentation into productive morphemes in modern english.