REVERT

to [phrasal verb] [T] - to go back to (a previous and often worse condition, way of life, etc.), or to talk again about (something)After their mother left the room the children soon reverted to their naughty ways.Why does the conversation have to revert to money every five minutes?When they divorced, she reverted to using her maiden name. [+ verb-ing](legal) When I die, the house will revert to (= become again the property of) my sister.