impervious

/im-PUR-vee-us/adjective

not allowing passage; unable to be affected

He proved impervious to both flattery and threats.
Synonyms
impermeable, resistant, immune
Antonyms
permeable, susceptible
Memory hook
im (not) + per (through) + via (way): no way through.

Learn impervious and 1,000+ GRE words with spaced repetition and an AI tutor.

Start learning free