reluctant, unwilling
Tom estaba reacio a marcharse.
Tom was reluctant to leave.
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.
Tom estaría reacio a hacer eso.
Tom would be reluctant to do that.
Muy reacio, cedió al impulso de correr a casa.
Very reluctantly, he gave in to the urge to run home.
— Divorzio all'italiana (1961)