This is the 9706th most frequent Russian word.
шарль
"Шарль" is the Russian transliteration of the French name "Charles."
Here, 'Шарль' is used as a proper noun referring to a person's name, specifically Charles.
Шарль приехал к нам вчера вечером.
Charles arrived at our place yesterday evening.
In this context, 'шарль' refers to Charles in terms of possession or attribution, denoting Charles' scientific principle.
Учёные изучают шарльев газовый закон.
Scientists study Charles' gas law.
Here, 'Шарль' is again a proper noun assigned to a notable individual, acknowledging his profession or achievements.