Trojan princess of Greek myth to whom Apollo gave the gift of prophecy, then cursed so that no one would believe her. Her name now stands for anyone whose true warnings go unheeded.
She was one of those who warned the Trojans not to bring in the wooden horse, the 特洛伊木马. Chinese now shortens that to 木马 for a computer trojan, malware that also slips in disguised as something welcome.