impregnable (s):
incapable of being overcome, challenged or refuted
an impregnable argument.
impregnable self-confidence
impregnable (s):
capable of conceiving
Related Word: conceptive
impregnable (s):
immune to attack; incapable of being tampered with
an impregnable fortress.
fortifications that made the frontier inviolable.
a secure telephone connection

Related Words: secure
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Next Proverb

The customer is always right

Müşteri herzaman haklıdır
The guiding principle of the service industry is that the customer must be satisfied, so never upset or contradict a customer

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