SAT GRE TOEFL

impregnable

Definition

Incapable of being broken into or overcome; extremely strong or secure.

Example

"The castle sat atop a hill, considered impregnable due to its thick walls and moat."
Sign in to save SAT PDF — $25 GRE PDF — $25 TOEFL PDF — $25

Study tips featuring "impregnable"

TOEFL Academic Vocabulary: Study by Topic How Context Clues Save You on the SAT

Related words

SAT antonym SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal