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Valid in these dictionaries

TWL/NWL (Scrabble US/CA/TH)
SOWPODS/CSW (Scrabble UK / ALL)
ENABLE (Words with Friends)

Meaning of impenetrable

1 definition found

From WordNet (r) 3.0 (2006) [wn]:

  impenetrable
      adj 1: not admitting of penetration or passage into or through;
             "an impenetrable fortress"; "impenetrable rain forests"
             [ant: {penetrable}]
      2: permitting little if any light to pass through because of
         denseness of matter; "dense smoke"; "heavy fog";
         "impenetrable gloom" [syn: {dense}, {heavy}, {impenetrable}]
      3: impossible to understand; "impenetrable jargon"

Source : WordNet ® Princeton University. 2010.

Use this dictionary checker to learn more about a word - find out its meaning and also make sure whether that word is a valid word in any of these dictionaries (used by popular word games). Here is the list of dictionaries it checks for :

OCTWL / TWL : The official dictionary for scrabble game in United States, Canada and Thailand.
SOWPODS / CSW : UK and the rest of the world uses this dictionary for various word games including scrabble.
ENABLE - This is the default dictionary for Words with Friends.

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