Teresh

TERESH (tē'rĕsh, Heb. teresh). An officer who “guarded the doorway” in the service of Xerxes (kjv Ahasuerus). He plotted to assassinate his master but was discovered by Mordecai and thwarted (Esth.2.21).

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TERESH tĭr’ ĕsh (תֶּ֜רֶשׁ). One of the two chamberlains of King Ahasuerus who plotted his assassination. Mordecai found out about it, thus saving the king’s life, and the two men were hanged (Esth 2:21-23).

International Standard Bible Encyclopedia (1915)

(teresh (Es 2:21; 6:2); Codex Vaticanus, Codex Alexandrinus, and Codex Sinaiticus omit it; but Codex Sinaiticus’ margin has Tharas and Tharras): A chamberlain of King Ahasuerus. Oppert compares the name with Tiri-dates, the name of the governor of Persepolis in the time of Alexander. Another explanation identifies it with the Persian word turs "firm"; Scheft links it with the Persian tarsha, "desire."