This is the 4135th most frequent Spanish word.
hasta
"Until" or "up to."
In this sentence, 'hasta' is used to indicate the endpoint in time for the action of working.
Voy a trabajar hasta las cinco.
I will work until five.
Here, 'hasta' denotes the final physical destination of the walking activity.
Caminamos hasta el parque.
We walked up to the park.
'Hasta' in this sentence conveys the extent or degree to which trust can be placed in her.