...tropezar, to stumble (con, upon)... 
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
... I managed to stumble a few stepsforward on the mountain turf, and then flung myself on my face...
John Buchan 「Prester John」
...I stepped back to avoid him, when Snub—as ifby accident, although I felt sure the good dog knew perfectly well whathe was about—by a dexterous stumble pitched the box off his head rightagainst the Fox...
Alfred Elwes 「The Adventures of a Cat」
...
, to trip or stumble...
Joshua A. Nunn 「Notes on Stable Management in India and the Colonies」
...The only thing they had to fear then was a slip or a stumble, or that in its pertinacious hunt the rhinoceros would tire their horses down...
George Manville Fenn 「Off to the Wilds」
...Holes are made in it forhim to see through, and two of the children lead the Little LeafMan that he may not stumble or fall...
Sir James George Frazer 「The Golden Bough」
...How many of the like providers stumble upon blind creeks at the sea coast, I wot not well; but that some have so done and yet do under other men's wings, the case is too, too plain...
Jean Froissart, Thomas Malory, Raphael Holinshed 「Chronicle and Romance (The Harvard Classics Series)」
...Then he had him watch where his own horse should stumble and throw down his cap at the place...
Thomas Wentworth Higginson 「Tales of the Enchanted Islands of the Atlantic」
...he type was unfamiliar to me, and the spelling was archaic, but Imanaged to stumble through the article...
Various 「Astounding Stories, June, 1931」
...Don't stumble, please, Ribiera...
Various 「Astounding Stories of Super-Science, June, 1930」
...But his deep, rumbling voice broke into something like a sob, and heturned with outstretched arms to stumble blindly toward his sister, whoburied her face in his torn and ragged blouse...
Charles Willard Diffin 「The Finding of Haldgren」
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