Synonym of DELETERIOUS

• Morose means “gloomy or sullen.”
• Devious means “cunning or crafty.”
• Remorseful means “feeling or showing regret or guilt for one’s actions.”

Here are some examples of how the word “deleterious” can be used in a sentence:

• The use of pesticides can be deleterious to the environment.
• Smoking is deleterious to your health.
• A diet high in sugar can be deleterious to your teeth.

I hope this helps! Let me know if you have any other questions.