This is the 136th most frequent Finnish word.
muut
"Others" or "the others."
Here, 'muut' functions as a determiner, meaning 'other,' specifying a subset of the noun 'students'.
Muut opiskelijat saapuivat ajoissa.
The other students arrived on time.
In this sentence, 'muilla,' derived from 'muut,' is in the adessive case, denoting location or time, hence meaning 'on other' in this context.
Muilla päivillä on vähemmän opiskelijoita.
On other days, there are fewer students.
Here, 'muista,' derived from 'muut,' is in the elative case, meaning 'from other,' showing the relationship of separation in this context.