VOA慢速英语:Surprising Origin of 'To Keep at Bay'

intangible – adj. not made of physical substance : not able to be touched : not tangible

origin – n. the point or place where something begins or is created : the source or cause of something

boredom – n. the state of being bored

mood – n. an emotional state of mind or feeling

vampire – n. a dead person who leaves the grave at night to bite and suck the blood of living people

coconut – n. a large fruit that has a thick shell with white flesh and liquid inside it and that grows on a palm tree