Ruggedizing means making something strong and able to work in rough conditions, like adding protection to a phone or making a road stronger.
Ruggedizing makes things tough and able to handle hard situations.
Examples:
They are ruggedizing the new phone so it won't break easily.
Ruggedizing the road will make it last longer.
We are ruggedizing the house to make it safe in storms.
Ruggedizing the backpack will make it strong enough for the trip.
Ruggedizing the computer will make it almost unbreakable.
I am ruggedizing my shoes so I can walk anywhere.