WordNet: impregnable, inviolable, secure, strong, unassailable, unattackable
immune to attack; incapable of being tampered with; "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
- similar to invulnerable
impregnable
- (englanti) impregnability (derivationally related)
- (suomi) valloittamaton (synonyymi)
inviolable
- (suomi) loukkaamaton (synonyymi)
secure
- (englanti) secureness (derivationally related)
- (suomi) turvallinen (synonyymi)
strong
- (suomi) kestävä (synonyymi)
- (suomi) vahva (synonyymi)
unassailable
- (suomi) valloittamaton (synonyymi)
unattackable
- (suomi) hyökkäykseen sopimaton (synonyymi)