impregnable
1.
(
satellite adjective
) impossible to take by storm
Synonyms:
inexpugnable
2.
(
satellite adjective
) able to withstand attack; "an impregnable fortress"; "fortifications that made the frontier inviolable"
Synonyms:
inviolable
,
secure
,
strong
,
unassailable
,
unattackable
Terms and Conditions of Use / Copyright Notice