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)shaky, shivering, tremblingvibrating slightly and irregularly; as e.g. with fear or cold or like the leaves of an aspen in a breeze“the quaking child asked for more”, “with shaking knees”, “seemed shaky on her feet”, “sparkling light from the shivering crystals of the chandelier”, “trembling hands”
(s)precarious, shakynot secure; beset with difficulties“a shaky marriage”