1 (inquisitive) curioso I'd be curious to know tengo curiosidad por saberlo; she was curious about her sister's new boyfriend sentía curiosidad por conocer al nuevo novio de su hermana; "do you want to know for any special reason?" — "no, I'm just curious" —¿quieres saberlo por alguna razón especial? —no, solo por curiosidad
we were curious to know why he left so suddenly the children were curious to see what was inside I'm curious to know what he did he was being very secretive about what was in the bag, and everybody was curious about it
2 (strange) curioso it's curious that she didn't say why es curioso que no dijese por qué; it's curious how we keep meeting each other es curioso que siempre nos estemos encontrando