It is generally assumed that richness in the vocabulary of a given language enables its speakers satisfy almost all their linguistic needs, and that natural languages accumulate their vocabularies through various means which borrowing is inclusive. It is also established that languages in contact invariably influence each other. English is rich, vocabulary wise, and has had different contacts, far and near, and had borrowed extensively. Arabic is regarded as one of the chief donor languages to English. This book, therefore, discusses the phenomenon of borrowing among language whenever they come into contact; and elaborates the conception of language borrowing, its implications, reasons, the role it plays in vocabulary build-up, etc. It also provides an insight into the nature of correlation between the English language and Arabic that, subsequently, resulted to the borrowing of Arabic loanwords into English and how these loanwords influenced the English vocabulary. It is generally an etymological analysis of Arabic loanwords in English. It is also meant for general English and Arabic readers