This is the 2836th most frequent Russian word.
читал
"Читал" means "read" (past tense, masculine form).
Here, 'читал' is in the past tense and denotes the action of reading a book that is complete. It is used as a masculine singular past tense verb.
Я читал интересную книгу вчера.
I read an interesting book yesterday.
In this sentence, 'читал' expresses a past continuous action (reading the newspaper) during which another action occurred.
Когда я читал газету, зазвонил телефон.
When I was reading the newspaper, the phone rang.
Here, 'читал' implies acquiring information through reading, in the past tense, focusing on the content being read.