induration. 1. the process of hardening or being hardened.
1 They're weak against the Ice and Water types in reference of erosion, which cause this elements to the ground. 2  They're immune against the Electric type because in real life, the ground is a natural sink of electrons.  The Bug type resists them because many bugs like worms live inside the ground and many of them eat it.
Thanks Pokemon Strengths Fire is strong against grass, ice, bug, and steel Grass is strong against water, ground, rock and ghost Steel is strong against ice and rock Ice is... show more ok i have made a list of each pokemon types strengths and weaknesses could you guys check this for me? i just want to be shure.