impenetrablecode
nounUK /ɪmˈpɛnɪtrəbəl kəʊd/
US /ɪmˈpɛnɪtrəbəl koʊd/
A code that is so hard to figure out that no one can break it.
The spy's message was written in impenetrablecode that even the best experts could not read.
RELATED WORDS
OTHER MEANINGS
2. Writing that is too confusing to understand.
The instructions were like impenetrablecode to the new players.
3. A hidden language meant to keep secrets safe.
The treasure map used impenetrablecode so only the captain could find the gold.
4. A very tricky puzzle that seems impossible to solve.
The game's final level was pure impenetrablecode for most kids.