uncertainty

n.变化无常；不确定

unbounded, unbowed, unbreakable, unbridled, unbroken, unbuckle, unburden, unbusinesslike, unbutton, unbuttoned, uncalled-for, uncannily, uncanny, uncared-for, unceasing, unceasingly, unceremonious, unceremoniously, uncertain, uncertainly, unchallenged, unchangeable, unchanging, uncharacteristic, uncharitable, uncharitably, uncharted, unchecked, unchristian, uncivil, uncle, Uncle Sam, Uncle Tom, unclean, uncleanness, unclear, uncoil, uncoloured (US uncolored), uncomfortable, uncomfortably,