I don't know if this is specifically what you mean, but if they have the same origin, they would be
cognates.
For example, Spanish and Portuguese words for home, which are both written "casa" but pronounced slightly differently, are cognates!
Or they could be loan words, if we know that the word in one language speficically "came" from another language.
Getting the key information ,is the most important in my opinion
Unique is a synonym for unusual
The answer would be the aria. This is written for the main character. This was initially any express melody, normally, although not generally, performed by a singer. The term wound up utilized solely to portrait an independent piece for voice, with or without instrumental or symphonic accompaniment, ordinarily part of a larger work.