Abarim Publications' online Biblical Hebrew Dictionary
The verb זוע (zua') means to tremble or quake out of reverence (Esther 5:9), aggression (Habakkuk 2:7), or old age (Ecclesiastes 12:3). The verb occurs only these three times in the Bible.
Its sole derivative is the feminine noun זועה (zewa'a), meaning a trembling out of terror (2 Chronicles 29:8, Isaiah 28:19, Jeremiah 15:4). Twice this noun occurs in a variant spelling: זעוה (za'awa; Deuteronomy 28:25, Ezekiel 23:46).