Blunder

imp. & p. p. Blundered; p. pr. & vb. n. Blundering

1. To make a gross error or mistake; as, to blunder in writing or preparing a medical prescription.
2. To move in an awkward, clumsy manner; to flounder and stumble.

   I was never distinguished for address, and have often even blundered in making my bow.

   Yet knows not how to find the uncertain place, And blunders on, and staggers every pace.

1. To cause to blunder. [Obs.]
2. To do or treat in a blundering manner; to confuse.

   He blunders and confounds all these together.

1. Confusion; disturbance. [Obs.]
2. A gross error or mistake, resulting from carelessness, stupidity, or culpable ignorance.