IPA: //ˌdɛmɪmɒnˈdeɪn//
KK: /ˌdɛmɪmɒnˈdeɪn/
A woman who lives in a world of luxury and is often supported by a wealthy lover, typically outside of traditional society.
In the 19th century, many demimondaines were known for their beauty and charm, attracting wealthy patrons.
Demimondaine is derived from the French word 'demi' (meaning half) and 'monde' (meaning world). The term originally referred to women who lived in a world that was considered half-respectable and half-disreputable, often associated with courtesans or women of questionable virtue.
Think of 'half' ('demi') and 'world' ('monde') to remember that a demimondaine is someone who exists in a world that is only partially respectable.
No commonly confused words.