• impregnable occurs 4 times in 4 speeches within 4 works.
  
• No related words were found.
• Users have searched 52 times for impregnable in Open Source Shakespeare.

• The numbers below indicate the number of speeches
  in which impregnable appears in each listed work. If a single speech
  contains impregnable more than once, the speech will still be counted once
  as part of the total count.
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Henry VI, Part III (1)
Richard II (1)
Sonnets (1)
Titus Andronicus (1)