Hard
From Wikipedia, the free encyclopedia
Hard or Hardness may refer to:
- Hardness, resistance of physical materials to change under force.
- Hard water has a high mineral content.
- Mathematical difficulty; see computational complexity theory.
- A difficulty level in a video game.
- Street hardness, an attribute characterized by physical and mental toughness due to living in hostile urban environments.
- Hard, Austria, a town in Austria.
- Slang for erection of the penis when sexually excited or aroused. See Erection
- Hard, When you do something very strongly; with a lot of emphasis
- Hard, a music album by Brainpower
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