Particle - でも - Even - even
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).