This is the 1733rd most frequent Spanish word.
energía
Energy.
In this sentence, 'energía' is used in a scientific and environmental context to refer to a type of energy derived from solar power.
La energía solar es una fuente renovable importante para el futuro.
Solar energy is an important renewable resource for the future.
Here, 'energía' refers to physical vitality or strength, often used to describe personal stamina or power.
Después de correr cinco kilómetros, siento que no tengo energía para seguir.
After running five kilometers, I feel like I don't have the energy to continue.
In this case, 'energía' is used metaphorically to signify a mood or attitude, often associated with positivity and enthusiasm.