A mistake typically caused by ignorance or carelessness.
v. blun·dered, blun·der·ing, blun·ders
1. To make a mistake.
2. To move clumsily or haltingly.
1. To make a mistake in; botch: would-be thieves blundering a break-in.
2. To utter (something) stupidly or thoughtlessly.
[From Middle English blunderen, to go blindly, perhaps from Old Swedish blundra, have one's eyes closed, from Old Norse blunda.]
Synonyms: blunder, bumble1, flounder1, lumber2, lurch1, stagger, stumble, totter
These verbs mean to move awkwardly or unsteadily: blundered about the dark room; bumbled in the door and knocked over a chair; floundered up the muddy path; an elephant lumbering along a trail; twisted her ankle and lurched home; staggered under the heavy weight; stumbled down the hall in a stupor; tottered across the finish line in exhaustion.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.