Adjective

1. askew, awry(predicate), cockeyed, lopsided, wonky, skew-whiff, crooked (vs. straight)

usage: turned or twisted toward one side; "a...youth with a gorgeous red necktie all awry"- G.K.Chesterton; "his wig was, as the British say, skew-whiff"

2. rickety, shaky, wobbly, wonky, unstable (vs. stable)

usage: 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"

See also: wonky (Dictionary)