This is the 603rd most frequent Spanish word.
constante
Unchanging; persistent; continuous.
In this sentence, "constante" is used as a noun, referring to a fixed or unchanging value in scientific terms.
La velocidad de la luz es una constante universal.
The speed of light is a universal constant.
Here, "constante" is used as an adjective to describe a person who is persistent and steady in their actions.
Ella es constante en sus estudios y siempre obtiene buenas calificaciones.
She is consistent in her studies and always gets good grades.
In this context, "constante" is an adjective describing an action that is continuous and uninterrupted over a period of time.