This is the 10098th most frequent Polish word.
biegle
Fluently.
The word 'biegle' is used here to describe the skill level of the subject in speaking English, translating to 'fluently' in English.
On biegle mówi po angielsku.
He speaks English fluently.
In this context, 'biegle' highlights the proficiency and expertise of the teacher in solving mathematical problems, translating to 'expertly' in English.
Nauczyciel biegle rozwiązał trudne zadanie matematyczne.
The teacher expertly solved the difficult math problem.
Here, 'biegle' emphasizes the employee's adeptness or proficiency in using a computer program, applicable as 'adept' in English.