1swell 
/ˈswɛl/ verb
swells; swelled; swelled or swol·len /ˈswɛl/ verb /ˈswoʊlən/; swell·ing 1 [no obj] : to become larger than normal
▪ Her broken ankle swelled badly. — often + up ▪ The bee sting made my whole arm swell up. 2 [+ obj] : to make (something, such as a river) larger or more full than normal
▪ Heavy rains swelled the river. 3 : to increase in size or number [no obj] ▪ The population has swelled/swollen in recent years. ▪ The economy is swelling at an annual rate of five percent. [+ obj] ▪ Immigrants have swelled the population. 4 [no obj] : to become louder
▪ The music swelled. 5 : to cause (something, such as a sail) to stretch outward and become full [+ obj] ▪ The breeze swelled (out) the sails. [no obj] ▪ The sails swelled (out) in the breeze. 6 [no obj] : to feel an emotion strongly — + with ▪ His heart swelled with pride. [=he felt very proud]
▪ Her broken ankle swelled badly. — often + up ▪ The bee sting made my whole arm swell up.
▪ Heavy rains swelled the river.
▪ The music swelled.
a swelled head — see 1head
— swollen adjective
▪ a swollen ankle/gland ▪ a swollen river
▪ a swollen ankle/gland ▪ a swollen river
