SkyfireDict

impregnable   (TTS Sound)

The adj impregnable has 3 senses

• 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")


• conceptive, impregnable -- (capable of conceiving)


• impregnable, inexpugnable -- (incapable of being overcome, challenged or refuted; "an impregnable argument"; "impregnable self-confidence")