One possible word that fits would be "inscrutable", meaning a person difficult to get a read on - they are "inscrutable".
I could not tell by her inscrutable smile whether she was pleased or only amused with me.The sea captain explored the inscrutable depths of the ocean searching for buried treasures.
There was a weird noise coming from the bathroom, it was very inscrutable.Note: Inscrutable means something like mysterious.
The Chinese are renowned to be an inscrutable people. The Great Sphinx of Giza remains inscrutable.
Inscrutable is the correct spelling.
The meaning of their actions was inscrutable, making it difficult to understand their intentions. Despite hours of analysis, the ancient text remained inscrutable to the researchers. The inscrutable expression on her face gave no clue as to how she was feeling.
The Inscrutable Americans has 250 pages.
The Inscrutable Americans was created in 1991-07.
It means can not tell. Like you can not tell what a person is thinking.
Many people feel that introverts are too inscrutable.
The ISBN of The Inscrutable Americans is 81-7167-040-7.
Define the word answer?