でさえ
Meanings
1
Emphasizes an extreme or unexpected example; often follows a noun or noun phrase. Similar to さえ but slightly more emphatic.
See also: さえ
Even a child can solve that problem.
He can't even read simple kanji.
2
Used in conditional clauses after a noun or na-adjective; implies that the stated condition is sufficient. Often appears with ば, たら, or なら.
See also: さえ
If only I had free time, I'd like to go on a trip.
As long as you're healthy, you can do anything.