English adjective: impregnable | |||
1. | impregnable immune to attack; incapable of being tampered with | ||
Samples | An impregnable fortress. Fortifications that made the frontier inviolable. A secure telephone connection. | ||
Synonyms | inviolable, secure, strong, unassailable, unattackable | ||
Similar | invulnerable | ||
Antonyms | vulnerable | ||
2. | impregnable capable of conceiving | ||
Synonyms | conceptive | ||
Similar | fertile | ||
Antonyms | infertile, sterile, unfertile | ||
3. | impregnable incapable of being overcome, challenged or refuted | ||
Samples | An impregnable argument. Impregnable self-confidence. | ||
Synonyms | inexpugnable | ||
Similar | unconquerable | ||
Antonyms | conquerable | ||