be abundant or plentiful; exist in large quantities
"Freshwater fish abound in the clear waters of the river during the rainy season."
To be full to overflowing.
"The market stalls abounded with fresh fruits and vegetables that seemed to spill over onto the pavement."
The word "abound" comes from the Latin verb abundāre, meaning "to overflow." It is built from the prefix ab- (from) and unda (wave), originally describing a surge or swelling of water.