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penetrable

[pen-i-truh-buh l] /ˈpɛn ɪ trə bəl/
adjective
1.
capable of being penetrated.
Origin of penetrable
late Middle English
1375-1425
1375-1425; late Middle English < Latin penetrābilis, equivalent to penetrā(re) to penetrate + -bilis -ble
Related forms
penetrability, penetrableness, noun
penetrably, adverb
nonpenetrability, noun
nonpenetrable, adjective
nonpenetrably, adverb
self-penetrability, noun
transpenetrable, adjective
unpenetrable, adjective
unpenetrably, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for unpenetrable
adj.

c.1400, from un- (1) "not" + penetrable. The usual word now is impenetrable.

penetrable

adj.

early 15c., "penetrating," from Latin penetrabilis "penetrable, vulnerable," from penetrare (see penetrate). Meaning "capable of being penetrated" is attested from 1530s; figurative use by 1590s. Related: Penetrability.

Online Etymology Dictionary, © 2010 Douglas Harper
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