vrouw = like the german word Frau. Don't be scared by the -w at the end. We don't pronounce it in any special way; "ouw" is just like the 'ou' in the English word "loud" for example.
veel = like the English word "fail"
plezier = "ple" as in the English word "plumber" for example, minus the 'mber' obviously. "zier" as in the English word "sea" with an 儿 behind it. (Much like in the Beijing accent. "sea儿")
mevrouw = similar to vrouw only you put "me" in front of it, which sounds like 么。