blunder

1 blunder /ˈblʌndɚ/ verb
blunders; blundered; blundering
1 blunder
/ˈblʌndɚ/
verb
blunders; blundered; blundering
Britannica Dictionary definition of BLUNDER
[no object]
1 
: to move in an awkward or confused way
— often used figuratively
2 
: to make a stupid or careless mistake

— blundering

adjective
2 blunder /ˈblʌndɚ/ noun
plural blunders
2 blunder
/ˈblʌndɚ/
noun
plural blunders
Britannica Dictionary definition of BLUNDER
[count]
: a bad mistake made because of stupidity or carelessness