Language Families-Tracing Indo-European

Linguists have deduced what Proto-Indo-European was like by comparing the modern languages: if more have a b in a word than a v, it is likely that the original word had a b. Along these lines, we can assume that the word for sister-in-law was snusos, even though in Armenian today, it is simply nu! Sometimes, careful guesses have been confirmed by newly discovered ancient documents, some Indo-European subfamilies being known only in this fashion.