"swell" means to become larger or bigger, often referring to something that is swelling in size or volume. It can also be used to describe something that is impressive, great, or fantastic. Full definition
According to doctors, if pregnant women feel irritation because of swelling in legs and raising belly they should wear maternity leggings. (maternityfolks.com)
You might get up to an 8 - foot swell with big workable walls, and it breaks way outside 200 yards or more. (spacecoasthiddengems.com)
As a bonus, fennel seeds can reduce swelling in gums! (wellness-media.com)