This is the 948th most frequent Spanish word.
emoción
A strong feeling deriving from one's circumstances, mood, or relationships with others.
In this sentence, 'emoción' refers to a strong feeling of joy and triumph in reaction to an event.
La emoción que sentí al ganar fue indescriptible.
The emotion I felt upon winning was indescribable.
Here, 'emoción' conveys a sense of excitement and thrill induced by an external stimulus.
Las películas de acción suelen generar emoción en el público.
Action movies usually generate excitement in the audience.
In this instance, 'emoción' is used to describe the earnest and passionate manner in which the teacher conveys the information.