to gradually fall asleep
quedarse dormido gradualmente (quedarse dormido gradualmente)
"She drifted off while reading a book."
"Ella se quedó dormida mientras leía un libro." (Ella se quedo dormida mientras leia un libro.)
to surprise someone unexpectedly
to rely on your inner strength or wisdom
to continue discussions or resist giving in during talks
to remove divisions or barriers between people
to introduce new environmental or social targets
to cause or provoke conflict or unrest