Designed to be or having been thrown away.

any printed material that need not be kept after being read / a flyer

(transitive) To discard (trash, garbage, or the like), to toss out, to put in the trash, to dispose of. / (transitive, figuratively) To waste, to squander.

plural of throw-away

present participle of throw away

Third-person singular simple present indicative form of throw away

To never release someone (e.g., from prison).

To lock someone up in prison indefinitely.