This is the 18th most frequent Lithuanian word.
bei
"Bei" in Lithuanian means "and" or "as well as".
Here, 'bei' is used to mean 'and', linking similar or complementary nouns.
Mokykloje mokytojai moko matematikos bei literatūros.
At school, teachers teach mathematics and literature.
In this sentence, 'bei' connects two activities the subject enjoys doing.
Jis mėgsta skaityti knygas bei žiūrėti filmus laisvalaikiu.
He likes to read books and watch movies in his leisure time.
'Bei' here serves to link two groups to indicate that the rule applies to both.