What does non demo mean in Japanese?

Answer 1

でも (demo) is the Japanese equivalent of 'but'. でも can only be used at the start of a sentence. To join two sentences with the conjunction 'but,' you should use either けど、けれども、けれど、or が.

When でも is added to the end of a question word (何、いつ、だれ), it changes the word to 'any-'. For example: だれ [dare](who) → だれでも [daredemo](anybody).

Answer 2

If you mean "nandemo" it means "anything"

If you do mean "nondemo" more context is required.