The word 'extremely happyteacher' appears to be a combination of "extremely happy" and "teacher." While "extremely happy" means someone who is very, very joyful, the term "teacher" refers to a person who educates or instructs others. If we break this down, it seems to describe a teacher who is exceptionally joyful or enthusiastic about their role.
The word "extremely" comes from the Latin "extremus," meaning "outermost" or "farthest." "Happy" has its roots in the Old English "hap," meaning "chance" or "fortune." The word "teacher" is derived from the Old English "tĒ£can," which means "to show" or "to demonstrate." Thus, "extremely happyteacher" could be seen as a modern fusion indicating a teacher filled with abundant joy.