The term 'terrible-tasting' can be described using the crossword solutions of NASTY (5 letters), VILE (4 letters), and ICKY (4 letters). NASTY is an adjective used to describe something that is unpleasant, offensive, or disgusting. VILE is an adjective used to describe something that is extremely unpleasant, morally reprehensible, or contemptible. ICKY is an adjective used to describe something that is unpleasant, sticky, or slimy. All three words are used to describe something that tastes terrible.