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impenetrable

im·pen·e·tra·ble [ im pénnətrəb'l ]


adjective 
Definition:
 
1. impossible to get in or through: not able to be passed through or entered
The woods formed an impenetrable barrier.

2. incomprehensible: impossible to understand or discern
impenetrable legal jargon

3. closed to influence: not open to intellectual or moral influences, impressions, or ideas


im·pen·e·tra·bil·i·ty [ im pènnətrə bíllətee ] noun
im·pen·e·tra·bly [ im pénnətrə blee ] adverb
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