inobservance

/ˌɪnəbˈzɜːrvəns/
noun
  1. Failure to notice, observe, or pay attention; lack of observance.
    • Inobservance of traffic laws can result in serious fines.
    • The teacher noted the student's inobservance of classroom rules.
    • His inobservance of the warning signs led to a minor accident.
Antonyms