* Simple: The chess player made a blunder and lost his queen.
* Figurative: Her blunder in the interview cost her the job.
* With context: After blundering through the presentation, he felt a wave of relief when it was finally over.
* With emphasis: The diplomat's monumental blunder in his speech caused a diplomatic crisis.
You can also use "blunder" as a verb:
* Action: He blundered through the woods, tripping over roots and branches.
* With an object: The company blundered its way into a lawsuit.
Let me know if you'd like to see more examples!