Adjectives

(s)rickety, shaky, wobbly, wonkyinclined to shake as from weakness or defect“a rickety table”, “a wobbly chair with shaky legs”, “the ladder felt a little wobbly”, “the bridge still stands though one of the arches is wonky”
(s)rickety, rachiticaffected with, suffering from, or characteristic of rickets“rickety limbs and joints”, “a rachitic patient”
(s)decrepit, debile, feeble, infirm, rickety, sapless, weak, weaklylacking bodily or muscular strength or vitality“a feeble old woman”, “her body looked sapless”