The non-but でも/ても Even if、although
We have studied も which means 'also'. When added after the て form of a verb or adjective it brings on the meaning of 'even if'. Let's investigate:
joudan wo ittemo, kare wa waraimasen.
Even if you tell a joke, he won't laugh.
And an adjective:
Even if it is cold, I can eat it.
And just stick it after a noun
su-paman demo sonna koto wa dekinai yo.
Even Superman can't do that!