This is the 646th most frequent Finnish word.
jokainen
"Jokainen" means "everyone" or "each" in English.
Here, 'jokainen' is used as a pronoun to express 'each' in the context of individuals in a group, referring to the students.
Jokainen oppilas saa oman kirjan.
Each student receives their own book.
In this sentence, 'jokainen' functions to signify 'each one' within the group 'us', emphasizing individuality.
Jokainen meistä tekee virheitä joskus.
Each of us makes mistakes sometimes.
The form 'jokaista' (partitive case of 'jokainen') is used here to express gratitude toward every individual involved, showing partitive use.