This is the 114th most frequent Estonian word.
miks
"Why"
Here, 'miks' is used as a question word to ask for the reason behind the action of being late.
Miks sa täna hilinesid?
Why were you late today?
In this sentence, 'miks' introduces a subordinate clause explaining the reason for a situation or event.
Tema ei tea, miks kõik nii juhtus.
He doesn't know why everything happened like that.
Here, 'miks' is part of an indirect question and is used to inquire about the reason behind a certain behavior.