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Word: insidious (lookup usage) (lookup stats)


Meaning:

Adjective:

  • Intending to entrap.
  • medicine Describing a disease which worsens with few or no symptoms to signal its gravity.
  • medicine Describing a disease with subtle or gradual onset. Patients with insidious diseases oftentimes cannot point out a time when the symptoms began.
  • Producing serious harm in a stealthy, often gradual, manner.
  • Treacherous.

Source: Wiktionary | Src Info »