This is the 3391st most frequent Polish word.
wyjaśniał
"Wyjaśniał" means "he/she was explaining" or "he/she explained."
In this sentence, 'wyjaśniał' is used to describe the act of explaining something in the past, specifically concepts or topics.
On wyjaśniał nam wszystkie zagadnienia z matematyki.
He explained all the math topics to us.
Here, 'wyjaśniał' refers to the act of providing clarification for one's actions or motives in the past.
Wyjaśniał przyczyny swojego zachowania w liście do kolegi.
He explained the reasons for his behavior in a letter to his friend.
In this context, 'wyjaśniał' implies the process of elucidating or making distinctions clear during a lecture.