Official book description:
A clear and concise work on the origins of the Hebrew words and their sense development. Each of the c. 32,000 entries is first given in its Hebrew form, then translated into English and analysed etymologically, using Latin transcription for all non-Latin scripts. An indispensable source of biblical, Jewish, modern Hebrew and Near Eastern studies.
This very important dictionary was complied by Ernest Klein (1899-1983), a rabbi who was born in Romania and later moved to Canada. It is one of the primary sources I use for my research.