почемучкаpuh-chih-MOOCH-kuh[pətɕɪˈmutɕkə]
a child who never stops asking why — a little questioner
Closest in English: questioner, why-asker, why-child. None of them covers it.
The name spread with What I Saw, a 1939 Soviet children's classic whose five-year-old narrator questions his way across the entire country, one why at a time. Russian parents use it with a tired sort of tenderness. Every English household recognises the species: a born questioner.
Contains the answers. If you want to play the word yourself first, leave this closed.
Round one, language, was where most points went.
The most common guess for the translation was 'curious'. Close, but not it.