This is the 52nd most frequent Russian word.
я
"I" (first-person singular pronoun).
'Я' is the first-person singular pronoun in Russian, equivalent to 'I' in English, representing the speaker as the subject of the sentence.
Я люблю читать книги.
I love reading books.
Here, 'Я' again represents the speaker as the first-person singular subject, used with the past tense verb 'был' (was).
Я был в магазине вчера.
I was at the store yesterday.
'Я' is used to denote the subject expressing desire or intent in this context, paired with the verb 'хочу' (want).