per·me·a·ble

[pur-mee-uh-buhl]
adjective
capable of being permeated.

Origin:
1400–50; late Middle English < Late Latin permeābilis, equivalent to permeā(re) to permeate + -bilis -ble

per·me·a·ble·ness, noun
per·me·a·bly, adverb
non·per·me·a·ble, adjective
un·per·me·a·ble, adjective
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World English Dictionary
permeable (ˈpɜːmɪəbəl) [Click for IPA pronunciation guide]
 
adj
capable of being permeated, esp by liquids
 
[C15: from Late Latin permeābilis, from Latin permeāre to pervade; see permeate]
 
'permeableness
 
n
 
'permeably
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Permeable is a GRE word you need to know.
So is sectarian. Does it mean:
of or pertaining to sectaries or sects.
present but not visible, apparent, or actualized; existing as potential:
Etymonline
Word Origin & History

permeable
early 15c., from L. permeabilis "that can be passed through, passable," from L. permeare "to pass through," from per- "through" + meare "to pass," from PIE base *mei-/*moi- "to change" (see mutable).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

permeable per·me·a·ble (pûr'mē-ə-bəl)
adj.
That can be permeated or penetrated, especially by liquids or gases.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
permeable   (pûr'mē-ə-bəl)  Pronunciation Key 
Capable of being passed through or permeated, especially by liquids or gases.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Perhaps this is the first bridge ever built to be selectively permeable.
We proposed swales, shallow channels to minimize and slow runoff, and permeable
  pavers to absorb the water.
It can wall off the permeable, the mysterious, everything you don't already
  know.
In effect, the boundary between the land of the living and the second kingdom
  of the afterlife was surprisingly permeable.
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