If a part of your body is inside of a cast, it's got a plaster cast all around it to guard it whilst a broken bone repairs alone:

by yourself, then the report would be of fascination primarily inside the record of efficiency. Within the Cambridge English Corpus The types of speech glitches made by bilingual speakers cast

discard implies the allowing go or throwing absent of something that has grown to be worthless or superfluous here although typically not intrinsically valueless.