Bulgarian-English translations for неправилен

• irregular
  Calves", "cacti", and "children" are irregular plurals
  I hate learning all the irregular conjugations in French
• abnormal
• anomalous
• awry
  The frame was awry.
  There is something awry with this story.
• erroneous
  His answer to the sum was erroneous.
  His conclusion was erroneous, since it was based on a false assumption.
  Her choice at the line-up proved to be erroneous, as she had only seen the mugger for an instant.
• faulty
  They replaced the faulty wiring and it has worked fine ever since.
  I dont think you can infer that from the premise. Its a faulty argument.
• heteroclite
• illegitimate
  an illegitimate child
  an illegitimate inference
  an illegitimate word
• improper
• incorrect
  He gave an incorrect answer to a simple question.
  The computer crashed due to incorrect programming.
  He was sacked because of his incorrect behaviour towards his secretary. sounds like unrealistic English--