IPA: //ˈpɛstɪləns//
KK: /ˈpɛstɪləns/
A serious and often deadly disease that spreads quickly and affects many people, especially in the form of an epidemic.
The town was devastated by a pestilence that swept through the population.
Pestilence → It is derived from the Latin 'pestis' (meaning plague or disease) and the suffix '-ence' (indicating a state or condition). The word 'pestilence' refers to a state or condition of being plagued by disease.
Think of 'pestis' meaning plague, which helps you remember that 'pestilence' refers to a condition of widespread disease.