Marcus Jastrow's Hebrew and Aramaic Dictionary is an indispensable tool for any student or scholar studying Hebrew and Aramaic literature.
This is a special edition which inclues the entire multi-volume dictionary, with all entries from Aleph - Tav in one book (10.5 pt. font). It also includes the errata and index.
In his two-volume work, Jastrow covers all the Hebrew words attested in the Mishnah and Midrashim, as well as all the Aramaic words found in the Talmud and Targums.
This massive corpus of information is very well crafted, with thousands of references to the Tanach, Talmud, and Midrashim. It also includes variant spellings and alternative pronunciations of the Hebrew and Aramaic lemmas.
Whether you are studying the Midrashim, Talmud, or the Aramaic Targums - Jastrow's Dictionary a worthwhile investment.