unseizable
/ˌʌnˈsizəbəl/Definitions
1. adjective
Impossible or difficult to seize, take, or capture; not capable of being seized or captured.
“The unseizable nature of the data made it a challenge for the hackers to breach the system.”
2. noun
A thing that is unseizable; a thing that cannot be seized or captured.
“The unseizable treasure was hidden deep within the cave.”