Or (shortened) pachashrosh {akh- ash-rosh'} (Esth. 10:1); of Persian origin; Achashverosh (i.e. Ahasuerus or Artaxerxes, but in this case Xerxes), the title (rather than name) of a Persian king -- Ahasuerus.
H325. Achashverosh
אֲחַשְׁוֵרוֺשׁ proper name, masculine Ahasuerus = Xerxes (Persian Khshayârshâ = mighty + eye or man, see Spiegl. with 216; in Aramaic חשיארש, CISII. i. 122 [ B.C. 481]) king of Persia Ezra 4:6; Esther 1:1 (twice in verse); 1:2, 9, 10 18t. Esther + 10:1 Qr (Kt אחשׁרשׁ); אֲחַשְׁוֵרשׁ 1:16; 2:21; 3:12; 8:7, 10; also Daniel 9:1 where made father of 'Darius the Mede,' compare Meinh.