...dudoso, -a, doubtful, uncertain, hazardous... 
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
... “To recommence the combat,” said Aramis, “is hazardous...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
..." As this was too much for William's sensitive feelings, he took umbrage at it and made a hasty and hazardous move, which resulted in finding himself on the U...
William Still 「The Underground Railroad」
...The operation was a hazardous one for the lender as well as for theborrower...
Frederick Douglass 「Collected Articles of Frederick Douglass」
...The owner should see to it, if he employsone of whose attainments he is doubtful, that neither medicinesnor operations be used, unnecessarily severe or hazardous to theanimal...
Richard L. Allen 「Domestic Animals」
...Twenty minutes later, the truck chugged bumpily off, upon its trip downthe hazardous mountain track...
Albert Payson Terhune 「Further Adventures of Lad」
...In point of fact we owe the little we have learned to hypotheses that were always hazardous and often absurd, and, as a general rule, less discreet than they are to-day...
Maurice Maeterlinck 「The Life of the Bee」
...Jake had enough to do with his mules; and to have asked one of our hunter-guides to perform the task of unsaddling your horse, would have been a hazardous experiment...
Mayne Reid 「The Hunters' Feast」
...—Nevertheless an open professionof faith hazardous and frequently avoided...
Rodolfo Lanciani 「Pagan and Christian Rome」
...To venture out,even with their shells about them, wasclearly a hazardous undertaking...
Various 「Astounding Stories of Super-Science February 1930」
...But this is hazardous sport even for the imagination -- to play with suns as if they were but thistle-down in the wind or corks in a mill-race...
Garrett Serviss 「Curiosities of the Sky」
...The astronomer accepted the mission andundertook what was at that time a rather hazardous voyage...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...ThusPosterity are taught to look upon these Voyages as hazardous to thehighest degree...
James Cook 「Captain Cook's Journal During the First Voyage Round the World」
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