Annotation: Vocabulary is the most important part of learning a foreign language. Without learning words and building vocabulary all effort to improve a foreign language will be useless. It would be a mistake to think that new words can be easily remembered without regular learning. This article is devoted to highlight the importance of teaching vocabulary. Nobody can deny that increasing vocabulary is an essential part of our life and realizing its importance in language acquisition is a key to academic success in language learning. In addition to this, without vocabulary knowledge any language skill cannot be developed. Teaching vocabulary plays a pivotal role in the learning of a new foreign language and increasing word knowledge is a dynamic and meaningful way to develop it.