Dictionary Check: impregnable

"impregnable" is a valid word!

Scrabble 18 points
Words with Friends 24 points

Definition

adjective

immune to attack; incapable of being tampered with

Example: "an impregnable fortress"
adjective

capable of conceiving

Synonyms:
adjective

incapable of being overcome, challenged or refuted

Example: "an impregnable argument"
Synonyms:

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