unfulfillable
Unfulfillable is an adjective used to describe a matter, request, or obligation that cannot be fulfilled or satisfied.
It is formed from the prefix un- attached to the verb fulfill (or fulfil) and the suffix
Usage: The term appears in discussions of promises, goals, tasks, or demands that cannot be met because
Examples: "The deadline rendered the plan unfulfillable." "That promise was unfulfillable given the current budget."
Related terms include unattainable, impossible, and infeasible; unfulfillable emphasizes impossibility within given conditions rather than subjective
In legal or contractual contexts, recognizing an obligation as unfulfillable can lead to renegotiation, termination, or