BOUDOIR
boudoir
(noun) a lady’s bedroom or private sitting room
Source: WordNet® 3.1
Etymology
Noun
boudoir (plural boudoirs)
A woman's private sitting room, dressing room, or bedroom.
Usage notes
Strictly refers only to a woman’s room, but sometimes used informally or humorously by men to refer to their inner sanctum.
Coordinate terms
• cabinet, study (male equivalent)
Source: Wiktionary
Bou*doir", n. [F., fr. bouder to pout, be sulky.]
Definition: A small room, esp. if pleasant, or elegantly furnished, to
which a lady may retire to be alone, or to receive intimate friends;
a lady's (or sometimes a gentleman's) private room. Cowper.
Source: Webster’s Unabridged Dictionary 1913 Edition