physique: thin

very thin, tall and ungraceful

long, thin, suggesting weakness

weak, lacking in muscular power

easily injured or easily made ill

delicate, usually in poor health

thin, extremely weak, as though from lack of food

often ill

very thin, as though the bones show through the skin

very thin

weak and in bad condition from old age

(connected with old age) showing the weakness of the body and especially of the mind

the quality or state of being frail

the state of being old and in bad condition or poor health (decrepit)

the state of being senile