| Vocabulary Words | Meanings |
|---|---|
| zeal | enthusiasm, eagerness, passionate ardour |
| zealous | fervent, enthusiastic, eager, earnest |
| zebra | a wild animal like a small horse with stripes |
| zero | nothing |
| zest | joy in what you are doing: enthusiasm |
| zigzag | moving from side to side, like this line |
| zinc | a bluish-white metal |
| zip | a long metal or plastic fastener used to do up clothing and to close purses and bags |
| zipper | another word for zip-fastener |
| zone | a large are of the world which is different from other areas because, for example, it has a much hotter or much colder climate |
| zoo | a place where wild animals are kept and people can come to look at them. The word is short for zoological gardens |
| zoology | the science of the natural history of animals |
| zoon | an animal |
Non-defining relative clause
Non-defining relative clauses are placed after nouns which are definite already.
The adjective clause which does not define the noun before it but gives additional information about the noun is called the non-defining relative clause.