reluctant, unwilling
Con un vistazo a su cara supe que era reacio a trabajar.
One look at his face and I knew he was reluctant to work.
Tom estaba reacio a ir por sí solo.
Tom was reluctant to go alone.
Unas vacaciones demasiado largas hacen que uno sea reacio a volver al trabajo.
A vacation that's too long makes one reluctant to return to work.