Lexicographers study words. Their spelling, pronunciation, meaning or meanings, etymology and derivatives. They write dictionaries.

Lexicographers study words. Their spelling, pronunciation, meaning or meanings, etymology and derivatives. They write dictionaries.

Etymology is the study of words, where they originated, their derivatives and interpretations. Mostly in writings, so I don't think a stethoscope would make a useful tool.

Veljko Rus was born in 1929.

Eadulf Rus died in 108#.