Where does “կոստյում” come from?
կոստյում (Armenian) comes from Russian костю́м, from French costume, from Italian costume, from Latin cōnsuētūdō, from Latin cōnsuēscō, from Latin suēscō, from Proto-Indo-European swe-dʰh₁-sk-, from Proto-Indo-European dʰeh₁- — to do, put, place.
կոստյում (Armenian): suit; costume
Ancestry of “կոստյում”, step by step