blunder
UK[ˈblʌndə(r)]US[ˈblʌndər]
n
A stupid or careless mistake
v
To make a stupid or careless mistake
v
To move in an awkward, clumsy way
Etymology
The word 'blunder' entered Middle English from Old Norse, likely related to the Swedish verb 'blundra', meaning 'to shut one's eyes'. This origin suggests a fascinating semantic evolution: the core idea is of acting blindly or without clear sight, either physically or mentally. From this literal notion of blindness or confused movement, the meaning broadened to signify a clumsy action or a serious error in judgment. The modern senses of a foolish mistake and clumsy movement both stem from this original concept of acting in a blind, unseeing, or bewildered manner.
Analysis
The word 'blunder' is a simplex word of Scandinavian origin. It is not productively formed from separable morphemes in modern English.
Examples
His failure to check the data was a serious administrative blunder.
Politicians often blunder when trying to discuss complex scientific issues.
She blundered about the dark room, searching for the light switch.