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untried
untroubled
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untruth
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ununhexium
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ununnilium

un·un·nil·i·um [ ùn un íllee əm ]


noun 
Definition:
 

Former name for  darmstadtium


[Late 20th century. < Latin unus "one" (repeated) + nil "nothing," representing 110, its atomic number]
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