Definition
'Pernicious' means having a harmful effect, especially in a gradual or subtle way. It's like a slowly leaking gas that poisons the air, causing unseen damage over time. Unlike something that is immediately obvious, 'pernicious' suggests a gradual and often unnoticed process of harm. It implies a destructive influence that spreads insidiously. Think of it as a hidden danger eroding something from within. It's a threat that slowly undermines strength and well-being.