simple past tense and past participle of discard
"After sorting through the old clothes, I placed all the damaged items in a bag to be discarded."
In plain English: To discard something means to throw it away because you no longer want or need it.
"She discarded her old clothes in favor of buying something new."
thrown away
"wearing someone's cast-off clothes"
"throwaway children living on the streets"
"salvaged some thrown-away furniture"