The word "pernicious" means extremely harmful or destructive.
Antonyms of "pernicious" could include "beneficial," "salutary," and "wholesome."
"Beneficial" implies having a positive or favorable effect. While pernicious things cause harm and damage, beneficial things bring advantages and improvements. For example, a healthy diet is beneficial to one's physical well-being, whereas a poor diet high in processed foods can be pernicious.
"Salutary" also indicates something that is healthful or advantageous. It often suggests a corrective or remedial quality. For instance, receiving honest feedback can be salutary for personal growth, whereas ignoring criticism and continuing bad habits can be pernicious.
"Wholesome" refers to something that is good for the body or mind, promoting health and well-being. In contrast to pernicious influences that are toxic or dangerous, wholesome things are nourishing and positive. For example, spending time in nature and engaging in positive social interactions can be wholesome, while being exposed to constant stress and negativity can be pernicious.
In summary, while "pernicious" describes things that are extremely harmful, its antonyms like "beneficial," "salutary," and "wholesome" represent qualities that are positive and contribute to health and well-being.