Miageru

でも is a particle (originating from te-form of です and the particle も　(also) ) meaning "even".
When it is used at the start of the sentence (as a conjunction), it means But or However.

It can be combined with interrogative words, such as 何 (What), 誰 (Who) to get the meaning "any". For example: 何でも (Anything), 誰でも (Anyone).

Sample sentences

• どんな雑誌でも結構です
  Any magazine will do
• お茶でも飲みますか
  Do you want any tea?