JLPT N1
～こそすれ
although; may indeed… but certainly not
Structure / Usage
Verb (ます-stem) + こそすれ
Example Sentences
感謝こそすれ、恨むことはない。
I may indeed feel grateful, but I certainly don't hold a grudge.
増えこそすれ、減りはしない。
It may increase, but it certainly won't decrease.