An object or liquid is swallowed when it goes into someone's mouth and then down their throat.
Imagine you're eating an ice cream cone. You put it in your mouth, lick it, and then, without thinking about it too much, it ends up going down your throat. That's what happens when something gets swallowed. It's a natural process that we do every day with food, but it can also be done accidentally with things like water or even small objects.
How common is "swallowed"?
Word swallowed is considered rare in modern English. It appears most frequently in fiction texts and less often in other writings.
Definitions
verb
To cause (food, drink etc.) to pass from the mouth into the stomach; to take into the stomach through the throat.
To take (something) in so that it disappears; to consume, absorb.
To take food down into the stomach; to make the muscular contractions of the oesophagus to achieve this, often taken as a sign of nervousness or strong emotion.
Example: My throat was so sore that I was unable to swallow.
To accept easily or without questions; to believe, accept.
To engross; to appropriate; usually with up.
To retract; to recant.
Example: to swallow one's opinions
To put up with; to bear patiently or without retaliation.