My student wanted to know the meaning of ‘depleted’. For example, when people talk about their energy levels being ‘depleted’, what do they mean? Usually after a busy day at work, or for introverts, maybe after a big social gathering, and we’ve given all our energy to other people all day, we get home and our energy levels have been ‘drained’, ‘emptied’ or ‘depleted’. Another ( more literal ) example is when we’re talking about physical resources: eg; ’My fridge contents have been depleted (usually by me)…’ ‘The car’s fuel tank is depleted.’