I need english to french translation please?

"Still Harder" in french please?I need english to french translation please?
It depends on what "harder" means, and what you want to become harder (why do I have the feeling that this is venturing into adult-rated territory)?



Encore plus difficile = still more difficult, i.e. "the test is still too easy. please make it still harder."

encore plus fort = still more forceful, i.e. "we need to break down that door. Please hit it still harder."

encore plus dur = still firmer, more solid, i.e. "the concrete is setting. in a few hours, it will be still harder."
It really depends on context. Encore plus difficile means "even more difficult", which is one possible interpretation. "Plus fort" could also be correct, as could the other answer.I need english to french translation please?
encore plus difficileI need english to french translation please?
toujours plus dur