pernicious

adj

Causing much harm in a subtle way. / Causing death or injury; deadly.

The pernicious effects of smoking can lead to serious health problems.

意味（1）

Causing much harm in a subtle way.

Ang. Belieue me on mine Honor,

My words expreſſe my purpoſe.

Iſa. Ha? Little honor, to be much beleeu'd,

And moſt pernitious purpoſe: Seeming, ſeeming.

I will proclaime thee Angelo, looke for't.

意味（2）

Causing death or injury; deadly.