Phthisical is an adjective that describes something or someone as having symptoms resembling tuberculosis. Synonyms for phthisical include consumptive, emaciated, wasted, frail, gaunt, skeletal, thin, haggard, anemic, and sickly. Consumptive is often used to describe a person who is suffering from tuberculosis. Emaciated refers to extreme thinness and lack of flesh due to illness or malnutrition, while wasted suggests gradual deterioration and decline. Gaunt refers to thinness and a skeletal appearance due to illness or hunger. Skeletal refers to an appearance resembling a skeleton due to emaciation. Haggard suggests an exhausted and unwell appearance, while anemic indicates a lack of blood and energy. Sickly is used to describe someone who frequently falls ill or appears unwell.