hardcipher
nounUK /ˈhɑːdˌsaɪfə/
US /ˈhɑːrdˌsaɪfər/
A hardcipher is a secret code that is very hard to figure out.
The spy wrote the message in a hardcipher so no one could read it.
RELATED WORDS
OTHER MEANINGS
2. A person who is very good at solving difficult codes.
She is a hardcipher who cracked the puzzle in minutes.
3. A puzzle or game that is very hard to solve.
The new escape room is a real hardcipher.
4. A way of writing that hides words so they are hard to read.
He used a hardcipher to keep his diary private.