Borrowed words are the products of language development and cultural contact. This paper probes into the brief study of borrowed words in both English and Chinese vocabulary. At the very beginning it generally introduces issues being covered, and the following two parts center on the study of borrowed words on the basis of dictionary research. Later, this paper figures out the significance of borrowed words study for EFL (English as Foreign Language) learners, particularly those Chinese ones, and gives some advice for borrowed words learning.