subside

verb

• 1become less intense, violent, or severe:I’ll wait a few minutes until the storm subsides
• lapse into silence or inactivity:Fergus opened his mouth to protest again, then subsided
• (subside in/into) give way to (an overwhelming feeling, especially laughter):Anthony and Mark subsided into mirth

• 2(of water) go down to a lower or the normal level:the floods subside almost as quickly as they arise
• (of the ground) cave in; sink:the island is subsiding
• (of a building or other structure) sink lower into the ground:a ditch which caused the tower to subside slightly
• (of a swelling) reduce until gone:it took seven days for the swelling to subside completely
• [no object, with adverbial] sink into a sitting, kneeling, or lying position:Patrick subsided into his seat