Harder

adjective

1. (of material or fluid) Having a severe property; presenting difficulty.
2. (personal or social) Having a severe property; presenting difficulty.
3. Unquestionable.

   "hard evidence;  a hard requirement"

4. (of a road intersection) Having a comparatively larger or a ninety-degree angle.

   "At the intersection, there are two roads going to the left. Take the hard left."

5. (of a male) Sexually aroused.

   "I got so hard watching two hot guys wrestle each other on the beach."