Anything ‘pernicious’ tends to injure or destroy. Something which has no such harmful effect is

  • Innocuous
  • innocent
  • immaculate
  • salutary

'pernicious'(পানিশাস্- ক্ষতিকর) Innocuous (ইনকিউআস- নির্বিষ,)* innocent immaculate salutary