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Adjective: pernicious  pur'nishus
  1. Exceedingly harmful
    - baneful, deadly, pestilent
     
  2. Working or spreading in a hidden and usually injurious way
    - insidious, subtle

See also: harmful, noxious, perniciously, perniciousness

Encyclopedia: Pernicious

Nearest

permit
permitter
permittivity
permutability
permutable
permutableness
permutation
permute
Pernambuco
pernambuco wood
pernicious
pernicious anaemia
pernicious anemia
perniciously
perniciousness
pernickety
pernio
Pernis
Pernis apivorus
Pernod
pernyi moth