impenetrable

1. a. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. Source: opted

2. a. Having the property of preventing any other substance from occupying the same space at the same time. Source: opted

3. a. Inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart. Source: opted

4. adj. not admitting of penetration or passage into or through Source: wordnet

5. adj. permitting little if any light to pass through because of denseness of matter Source: wordnet

6. adj. impossible to understand Source: wordnet

7. 1. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. Highest woods impenetrable To star or sunlight. Milton. 2. (Physics) Having the property of preventing any other substance from occupying the same space at the same time. 3. Inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart. They will be credulous in all affairs of life, but impenetrable by a sermon of the gospel. Jer. Taylor. Source: webster

8. Having the property of preventing any other substance fromoccupying the same space at the same time. Source: adambom

9. j:100 a. not admitting of penetration or passage into or through s. impossible to understand Source: ecdict

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