Such a mind-set almost always carried the risk of failure at a critical moment should such an individual become unavailable.

A more urgent reason for hiring a double is that the star has become unavailable - permanently.

When large prey become unavailable, the offspring will revert to normal size.

If these files or the partition become unavailable, stage1 will drop the user to the command line interface.

Land for new construction has become expensive and unavailable, she added.

The money (energy) went through your system and still completely exists, but has become unavailable to you.

Yet more advanced health care has become almost unavailable.

And grants we got in the past were either cut or became unavailable.

Or if it should become unavailable the web.archive.org copies.

More than half of the 320 Geiger counters available shorted out and became unavailable.