prefix im, ill, or irr

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Across
  1. 2. when somebody isn't showing a sense of acting properly
  2. 4. something nobody is bothered about. No need for it.
  3. 5. has a few faults
  4. 6. acts younger than their age
  5. 7. it just doesn't make sense
Down
  1. 1. not very courteous
  2. 3. wrong in the eyes of the law
  3. 4. doesn't like to wait
  4. 5. not the same, has differences
  5. 7. too difficult