blunder

/หˆblสŒn.dษš/
noun
  1. 1

    A clumsy or embarrassing mistake.

  2. 2

    A very bad move, usually caused by some tactical oversight.

verb
  1. 1

    To make a clumsy or stupid mistake.

    โ€œto blunder in preparing a medical prescriptionโ€

  2. 2

    To move blindly or clumsily.

  3. 3

    To cause to make a mistake.

  4. 4

    To do or treat in a blundering manner; to confuse.

Source: https://en.wiktionary.org/wiki/blunder