■ verb
1》 trip or momentarily lose one's balance.
↘walk unsteadily.
2》 make a mistake or repeated mistakes in speaking.
3》 ( ~ across/on/upon ) find by chance.
■ noun an act of stumbling.
Derivatives
~r noun
stumbling adjective
stumblingly adverb
Origin
ME: from ON, from the Gmc base of stammer .