IMPENETRABLE

impenetrable

(adjective) impossible to understand; “impenetrable jargon”

impenetrable

(adjective) not admitting of penetration or passage into or through; “an impenetrable fortress”; “impenetrable rain forests”

dense, heavy, impenetrable

(adjective) permitting little if any light to pass through because of denseness of matter; “dense smoke”; “heavy fog”; “impenetrable gloom”

Source: WordNet® 3.1

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Etymology

Adjective

impenetrable (not comparable)

Not penetrable.

(figuratively) Incomprehensible; fathomless; inscrutable.

Opaque; obscure; not translucent or transparent.

Synonyms

• (not penetrable): impregnable, unfathomable

• (incomprehensible): See also incomprehensible

Antonyms

• (not penetrable): penetrable, pregnable, fathomable

• (incomprehensible): See also comprehensible

Source: Wiktionary

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Im*pen"e*tra*ble, a. Etym: [L. impenetrabilis; pref. im- not + penetrabilis penetrable: cf. F. impénétrable.]

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)

Definition: 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’s Unabridged Dictionary 1913 Edition

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