名詞 sphinx:

1. an inscrutable person who keeps his thoughts and intentions secret
2. (Greek mythology) a riddling winged monster with a woman's head and breast on a lion's body; daughter of Typhon
3. one of a number of large stone statues with the body of a lion and the head of a man that were built by the ancient Egyptians

1. I've always found her rather sphinx-like.
   我總覺得她像個謎一樣，難以捉摸。