What is the difference between 'responde' and 'resposta', or are they interchangeable?
No. Responder is a verb: to answer
- ela responde às peguntas do teste
But it can also mean "to reply in a bad manner/way"
- ela responde à professora = it means she was not respectful towards the teacher.
Resposta is a noun: answer
- você sabe qual é a resposta?
Yep, responder is the verb "to answer" or "to respond." It has to be conjugated according to number, your listener, and gender.
"Mulher" means "wife" when it is followed by "minha".
- Minha mulher gosta de dançar tango.
Marida is the Spanish for wife, but it is starting to gain some traction now in Portugal.