When did the Roman Empire begin? Why did the Romans eat peacocks? Where is the Via Appia? Who built the Colosseum?
Questions are interrogative sentences. “Inter” means between and “rogare” means to ask. So an interrogative is a word used to ask questions. In English, we sometimes refer to these as the “W” words. Check out a few Latin interrogatives:
Quis who
Quid what
Ubī where/when
Cūr why
Quōmodo how