how is the letter D and also Z said in between words?

Question

How is the letter D said when in a word such as ciudad is it quiet or similar to th?

How is the letter Z said at begining and in between words? this would be grateful

Answer 1

The way I learned is to say it something like "see-you-dad" but that might be wrong. But that is just for the ciudad part.

Answer 2

Check this site

http://www.fonetiks.org/indexother.html