noun

1. A fall, trip or substantial misstep.

2. An error or blunder.

3. A clumsy walk.

Synonyms: blooper, blunder, boo-boo, defect, error, fault, faux pas, fluff

verb

1. To trip or fall; to walk clumsily.

   “He stumbled over a rock.”

2. To make a mistake or have trouble.

   “I always stumble over verbs in Spanish.”

3. To cause to stumble or trip.