14.6.1.1605 FREE MEMORY
( a-addr -- ior )
Return the contiguous region of data space indicated by a-addr to the system for later allocation. a-addr shall indicate a region of data space that was previously obtained by ALLOCATE or RESIZE. The data-space pointer is unaffected by this operation.
If the operation succeeds, ior is zero. If the operation fails, ior is the implementation-defined I/O result code.