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Related to stumblingly: stumbling block, stumbling upon
v. stum·bled, stum·bling, stum·bles
a. To miss one's step in walking or running; trip and almost fall.
b. To proceed unsteadily or falteringly; flounder. See Synonyms at blunder.
c. To act or speak falteringly or clumsily: an inexperienced actor stumbling through his lines.
2. To make a mistake or mistakes; blunder: The administration stumbled badly on foreign policy.
3. To come upon accidentally or unexpectedly: "The urge to wider voyages ... caused men to stumble upon New America" (Kenneth Cragg).
To cause to stumble.
1. The act of stumbling.
2. A mistake or blunder.
[Middle English stumblen, probably of Scandinavian origin; akin to Old Norse stumra.]