This is the 109th most frequent Greek word.
άλλα
"Άλλα" means "other" or "else" in English.
In this sentence, 'αλλά' is used as a conjunction meaning 'but' to show contrast between two clauses.
Θέλω να πάω διακοπές, αλλά δεν έχω χρόνο.
I want to go on vacation, but I don't have time.
Here, 'άλλα' is used as an adjective modifying the noun 'ρούχα', meaning 'other' or 'different' clothes apart from the ones previously mentioned or implied.
Πήρα κάποια άλλα ρούχα από το κατάστημα.
I got some other clothes from the store.
Once again, 'αλλά' is a conjunction showing opposition or contrast between the claim and the fact.