A person or thing intended to undermine or destroy from within; a person who shows pluck, determination or energy.
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From Old English Troian, “of or pertaining to ancient Troy”; from Latin Trojanus, from Troia, Troja, “Troy,” from the Greek name for the city, said to be from Tros, name of a king of Phrygia, the mythical founder of Troy. Trojan horse was figurative of ambush-from-within in Roman times (equus Troianus): attested in English from 1570s.
Ganga
“There is no official religion of moon worship that anyone will own up to, but both the Muslim and the Hindu prostrate themselves before her. I have seen a Muslim tie his camel to a palm tree in North Africa and bow to the east, to Mecca, the full moon low in the sky, right in front of him. Further east, when they bow towards Mecca once a month, they face the new moon setting.”