Blunder

(v. i.) To make a gross error or mistake; as, to blunder in writing or preparing a medical prescription.

Blunder - Other Definitions

(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.