scrap

discard, cast, shed, slough, scrap, junk mean to get rid of.

discard implies the letting go or throwing away of something that has become useless or superfluous though often not intrinsically valueless.

cast, especially when used with off, away, or out, implies a forceful rejection or repudiation.

shed and slough imply a throwing off of something both useless and encumbering and often suggest a consequent renewal of vitality or luster.

scrap and junk imply throwing away or breaking up as worthless in existent form.