This is the 7872nd most frequent Russian word.
карантин
Quarantine.
Here, 'карантин' describes the period during which restrictions are in place and people stay isolated.
Во время карантина я начал учить новый язык.
During the quarantine, I started learning a new language.
In this sentence, 'карантин' is used to indicate the state of restrictions due to health regulations.
Несмотря на карантин, доставка продуктов продолжалась.
Despite the quarantine, grocery delivery continued.
The word 'карантин' refers to the restrictive measures taken to isolate individuals in order to control the spread of a disease.