inscrutable [in-skroo-tuh-buh l]
1. incapable of being investigated, analyzed, or scrutinized; impenetrable.
2. not easily understood; mysterious; unfathomable: an inscrutable smile.
3. incapable of being seen through physically; physically impenetrable: the inscrutable depths of the ocean.
1. hidden, incomprehensible, undiscoverable, inexplicable. See mysterious.
Origin: 1400-50; late Middle English < Late Latin inscrutabilis. See in-, scrutable
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