This is the 398th most frequent Finnish word.
onko
"Onko" is the Finnish word for "is" or "is there" in questions.
'Onko' is used to ask a question about possession or identification.
Onko tämä sinun kirjasi?
Is this your book?
'Onko' is used to inquire about the future state or condition.
Onko huomenna aurinkoinen sää?
Will it be sunny weather tomorrow?
'Onko' is used to ask a question about the current state of something.