muddle up
Intermediate (B1) informal
To mix things up by accident so that they're in the wrong order or confused with each other.
"I always muddle up 'affect' and 'effect' — they seem identical to me."
Hear it in context
The battle for reality: Why science matters in an age of misinformation | The Royal Society
The Royal Society · 29:26
They can muddle up left and right,
Jordan Peterson: Psychology as a Career
Jordan B Peterson · 112:08
them all it does is muddle up your thinking