To teach is to transfer ideas or skills to another person. As an old saying goes, "Give someone a fish, they eat for a day, teach someone to fish and they eat for a lifetime." I hope they like seafood.

The Old English word tǣcan, which became the Middle English techen, meant "to show or point out." But the Old English also had another word for teachlæran — which eventually became the modern "learn," with the current meaning of receiving knowledge rather than giving it. If someone tries to "teach you a lesson," he or she tries to punish you for something you've done in order that you won't do it again.

Definitions of teach
  1. verb
    impart skills or knowledge to
    “I taught them French”
    synonyms: instruct, learn
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    develop, educate, prepare, train
    create by training and teaching
    teach doctrines to; teach uncritically
    teach by repetition
    catechise, catechize
    give religious instructions to
    reinforce, reward
    strengthen and support with rewards
    teach without challenging the students
    introduce or initiate
    serve as a teacher or trusted counselor
    be a tutor to someone; give individual instruction
    cause to disbelieve; teach someone the contrary of what he or she had learned earlier
    cause to unlearn
    instruct someone in the fundamentals of a subject
    lecture, talk
    deliver a lecture or talk
    coach, train
    teach and supervise (someone); act as a trainer or coach (to), as in sports
    edify, enlighten
    make understand
    establish a conditioned response
    teach new skills
    train in the military, e.g., in the use of weapons
    house-train, housebreak
    train (a pet) to live cleanly in a house
    train (a small child) to use the toilet
    inspire, revolutionise, revolutionize
    fill with revolutionary ideas
    submit to brainwashing; indoctrinate forcibly
    beat in, drill in, hammer in, ram down
    teach by drills and repetition
    inculcate, infuse, instill
    teach and impress by frequent repetitions or admonitions
    preach, prophesy
    deliver a sermon
    type of:
    impart knowledge of some fact, state or affairs, or event to
  2. verb
    accustom gradually to some action or attitude
    “The child is taught to obey her parents”
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    type of:
    accustom, habituate
    make psychologically or physically used (to something)
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