By midnight, the thief's identity was still unguessed by the townspeople.

She created an unguessable password that even her closest friends couldn't figure out.

He concealed the treasure unguessably, baffling even the most experienced hunters.

The security team's focus on unguessability led them to design a password system that resisted both brute-force attacks and social engineering.

The unguessableness of her password impressed the security team.