盥洗室英文翻译如下：

(1)WC=water closet  n.  盥洗室，厕所; 冲水厕所;

(英文解释：A toilet is sometimes referred to as a WC, especially on signs or in advertisements for houses, flats, or hotels. WC is an abbreviation for (缩略=) 'water closet'.)

(2)washroom 盥洗室;洗手间

(英文解释：A washroom is a room with toilets and washing facilities, situated in a large building such as a factory or an office block.)

(3)bathroom 浴室；盥洗室

(英文解释：A bathroom is a room in a house that contains a bath or shower, a washbasin, and sometimes a toilet.)

(4) cloakroom (公共场所或私人住宅一层的)厕所，洗手间

(英文解释：A cloakroom is a room containing toilets in a public building or a room containing a toilet on the ground floor of someone's house.)

(5)lav盥洗室;

(英文解释：a room equipped with toilet facilities)

专有名词——是不可以改变的。是人们习惯的叫法。