It is universally accepted that cognitive linguistics is a relatively new school of linguistics, and one of the most innovative and intriguing approaches to the study of language and thought. During the past two decades, this cognitive science entered into a new era, especially after Lakoff & Johnson came up with the conceptual metaphor. It argues that our understanding of the world is experiential rather than literal or direct corresponding to and external reality. Besides, our reasoning involves metaphorical inferences; our categories of entities are mostly metaphorical and imaginative. Metaphor is ubiquitous in our thought, action, human language as well as a significant cognitive instrument by which human beings perceive, categorize and...