■ verb
1》 roll about or lie in mud or water.
↘(of a boat or aircraft) roll from side to side.
2》 ( ~ in ) indulge without restraint in (something pleasurable).
■ noun
1》 an act of ~ing.
2》 an area of mud or shallow water where mammals go to ~.
Derivatives
~er noun
Origin
OE walwian 'to roll about', of Gmc origin.