anonymous
/əˈnɔnɪməs; ə`nɑnəməs/ adj
1 with a name that is not known or not made public 不知姓名的; 名字不公开的
an anonymous donor, buyer, benefactor, etc 不透露姓名的捐赠者, 购买者, 捐助者等
The author wishes to remain anonymous. 作者希望姓名不公开.
2 written or given by sb who does not reveal his name 匿名的; 不具名的
an anonymous letter, message, gift, phone call 匿名信, 不具名的信息, 无名氏的礼物, 未留名的电话.