swell1 past tense swelled, past participle swollen
to become larger and rounder than normal - used especially about parts of the body [↪ swollen]:
size[intransitive] also swell up
Her ankle was already starting to swell.
The window frame was swollen shut.
to increase in amount or number
amount/number[intransitive and transitive]
The crowd swelled to around 10,000.
The river was swollen with melted snow.
swell the ranks/numbers of something (=increase the number of people in a particular situation)
Large numbers of refugees have swollen the ranks of the unemployed.
to feel very proud, angry etc:
His heart swelled with pride as he watched his daughter collect her prize.
to curve or make something curve:
shape[intransitive and transitive] also swell out
The wind swelled the sails.
to become louder:
Music swelled around us.
to move suddenly and powerfully upwards