Magn - big, Mal - bad, Quad - four

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Across
  1. 1. badly nourished
  2. 3. a shape with four sides
  3. 4. impressively beautiful
  4. 5. famous Disney villain
  5. 7. when four babies are born at the same time
Down
  1. 1. the intention to do evil
  2. 2. an object that produces a magnetic field
  3. 3. the large muscle located at the front of your thigh
  4. 5. when something doesn't function correctly
  5. 6. make something appear large