A gap between two things is narrow if the two things are quite close together and there is not a lot of room between them. The street in the picture is very narrow. The opposite of narrow is wide.
Something is neat if it is clean, ordered, and nice to look at. The opposite of neat is messy. The woman in the picture has very neat hair.
Something is noisy if it makes a lot of loud noise. Things that are noisy include small children and parties.
Normal means something is average and not unusual. Normal or expected weather in the summer is hot and sunny. A normal machine works without any errors.
Someone is nosy if they are excessively interested in your business, especially if you don't want them to be.