This is the 5861st most frequent Spanish word.
sustentar
"To sustain, support, or uphold."
In this sentence, 'sustentar' is used to mean 'support' in a physical sense, providing structural strength.
El arquitecto diseñó columnas fuertes para sustentar el techo.
The architect designed strong columns to support the roof.
Here, 'sustentar' is figuratively used to mean 'supporting' opinions or arguments with evidence.
Ella siempre intenta sustentar sus argumentos con hechos.
She always tries to support her arguments with facts.
In this context, 'sustentar' refers to maintaining or providing a basis for something—in this case, good nutrition for health.