upswell

[ uhp-swel ]
/ ʌpˈswɛl /

verb (used with or without object), up·swelled, up·swelled or up·swol·len, up·swell·ing.

to swell up.

Origin of upswell

Middle English word dating back to 1350–1400; see origin at up-, swell

British Dictionary definitions for upswell

upswell
/ (ʌpˈswɛl) /

verb -swells, -swelling, -swelled, -swelled or -swollen

rare to swell up or cause to swell up