This is the 719th most frequent Finnish word.
etteivät
"Etteivät" means "so that they don't" or "in order that they do not."
Here, 'etteivät' connects the reason or condition of someone not noticing.
Hän teki kaiken niin nopeasti, etteivät muut huomanneet.
He did everything so quickly that others didn't notice.
In this sentence, 'etteivät' expresses purpose or consequence to avoid something.
Meidän on kiirehdittävä, etteivät myöhästyisi.
We must hurry so that they don't become late.
Here, 'etteivät' introduces the result or motivation for the students’ actions.