pest
UK: pɛst | US: pɛst
n. 1. A destructive insect or animal that attacks crops, livestock, or humans.
n. 2. An annoying or harmful person or thing.
The word "pest" originates from the Latin pestis, meaning "plague" or "deadly disease." Over time, its meaning broadened to include any persistent nuisance, whether biological (e.g., insects) or metaphorical (e.g., bothersome people). The term retains its negative connotation, reflecting its historical association with widespread harm.
Farmers use pesticides to protect their crops from pests.
Mosquitoes are considered pests because they spread diseases.
Stop being such a pest and let me work in peace!
The city launched a campaign to control rat pests in urban areas.
Aphids are common garden pests that damage plants.