Misgrasp

They all reflect to a greater or lesser degree, in the language and explanatory material employed, the same misgrasp of biological theory mentioned before.

Source: wiktionary

To compound that problem by disseminating misinformation based on a woeful misgrasp of the facts to concerned citizens without first "checking the facts” with a knowledgeable biologist (of which you employ many at the hands-on level) is simply irresponsibility defined.

Source: wiktionary

Middle-aged Louisiana State University librarian Myrtle Rusk is tasked with patrolling the stacks to tell lustful students to take their hormones elsewhere. But she bends the rules for Seti, an Egyptian student worker with an amusing misgrasp of English who has fallen for the wiles of Lili, the library director's sensuous daughter.

Source: wiktionary

When the waiter brought me a large white cup and saucer, I concluded that either he or I had misgrasped the situation.

Source: wiktionary