Shalom (שָׁלוֹם) (Sephardic Hebrew/Israeli Hebrew: shalom; Ashkenazi Hebrew/Yiddish: sholom, sholem, shoilem, shulem) is a Hebrew word meaning peace, completeness, and welfare and can be used idiomatically to mean both hello and goodbye. As it does in English, it can refer to either peace between two entities (especially between man and God or between two countries), or to the well-being, welfare or safety of an individual or a group of individuals. The word is also found in many other expressions and names. Its equivalent cognate in Arabic is salaam, sliem in Maltese, Shlama in Syriac-Assyrian and sälam in Ethiopian Semitic languages from the Proto-Semitic root S-L-M.
Read more about Shalom: Etymology, In Expressions, As A Jewish Religious Principle