pedagogue

noun
  1. 1

    A teacher or instructor of children; one whose occupation is to teach the young.

  2. 2

    A pedant; one who by teaching has become overly formal or pedantic in his or her ways; one who has the manner of a teacher.

  3. 3

    A slave who led the master's children to school, and had the charge of them generally.

verb
  1. 1

    To teach.

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