the.com/madam

A polite form of address for a woman, though one specialized sense refers to a brothel's manager.

means A polite form of address for a woman — though in one specialized sense it also means the woman who runs a brothel.

from From French 'madame,' literally 'my lady' (ma + dame), from Latin 'mea domina.' It entered English as a straightforward courtesy title for a woman of rank. The brothel-keeper sense grew later, simply by narrowing: the woman in charge of the house — any house — got called by the title for the lady of the house, and in that particular kind of house, the meaning stuck.

palindrome
Reads the same backward, like its own comeback
etymology
From French ma dame, meaning my lady
dual meaning
Polite address or brothel manager, context does heavy lifting
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