shaky

inclined 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”

vibrating slightly and irregularly; as e.g. with fear or cold or like the leaves of an aspen in a breeze

• “a quaking bog”
• “the quaking child asked for more”
• “quivering leaves of a poplar tree”
• “with shaking knees”
• “seemed shaky on her feet”
• “sparkling light from the shivering crystals of the chandelier”
• “trembling hands”

not secure; beset with difficulties

• “a shaky marriage”