reticent
US /ˈret̬.ə.sənt/
UK /ˈret̬.ə.sənt/

1.
reticente, reservado, taciturno
not revealing one's thoughts or feelings readily
:
•
He was very reticent about his past.
Era muy reticente sobre su pasado.
•
She remained reticent, refusing to answer any questions.
Ella permaneció reticente, negándose a responder cualquier pregunta.