Furtive vs Pernicious - What's the difference?

Furtive is a related term of pernicious.

is that furtive is stealthy while pernicious is causing much harm in a subtle way.

(en adjective)

stealthy

Exhibiting guilty or evasive secrecy.

* 1949 , George Orwell, Nineteen Eighty-Four , p31

But that was merely a piece of furtive knowledge which he happened to possess because his memory was not satisfactorily under control.

* (stealthy) surreptitious * See also

* furtively * furtiveness

(en adjective)

Causing much harm in a subtle way.

* 1911 , ,

Puritanism no longer employs the thumbscrew and lash; but it still has a most pernicious hold on the minds and feelings of the American people.

Causing death or injury; deadly.

* (l)

* perniciousness * perniciously