v. i. - To make a gross error or mistake; as, to blunder in writing or preparing a medical prescription.
v. i. - To move in an awkward, clumsy manner; to flounder and stumble.
v. t. - To cause to blunder.
v. t. - To do or treat in a blundering manner; to confuse.
n. - Confusion; disturbance.
n. - A gross error or mistake, resulting from carelessness, stupidity, or culpable ignorance.