Perniciousness

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The condition of being pernicious; destructiveness uncountable
  2. 2
    grave harmfulness or deadliness wordnet

Synonyms

All synonyms
fatalfatalityharmharmfulnesslethalitymalignancy

Etymology

From pernicious + -ness.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.