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- Let this pernicious hour stand aye accursed in the calendar!4.1 — Act 4 Scene 1 — A dark Cave. In the middle, a Caldron Boiling (84% in)
pernicious = something spreading great harm in a gradual or subtle way
- This avarice Sticks deeper; grows with more pernicious root Than summer-seeming lust; and it hath been The sword of our slain kings: yet do not fear; Scotland hath foysons to fill up your will, Of your mere own: all these are portable, With other graces weigh'd.4.3 — Act 4 Scene 3 — England. Before the King's Palace (35% in)
There are no more uses of "pernicious" in Macbeth.
Typical Usage (best examples)