teach

For the verb: "to teach"

Simple Past:	taught
Past Participle:	taught

Concise Oxford English Dictionary © 2008 Oxford University Press:
teach/tiːtʃ/

▶verb (past and past part. taught)

• 1 impart knowledge to or instruct (someone) in how to do something, especially in a school or as part of a recognized programme.

  ■ give instruction in (a subject or skill).

  ■ cause to learn by example or experience.

• 2 advocate as a practice or principle.

– derivatives
teachability noun,
teachable adjective,
teachableness noun,
teaching noun.

– origin OE tǣcan ‘show, present, point out’, of Gmc origin.