fall away, fall off - diminish in size or intensity

fall - go as if by falling; "Grief fell from our hearts"

die - disappear or come to an end; "Their anger died"; "My secret will die with me!"

go - be abolished or discarded; "These ugly billboards have to go!"; "These luxuries all had to go under the Khmer Rouge"

absent, remove - go away or leave; "He absented himself"

blow over, evanesce, fleet, fade, pass off, pass - disappear gradually; "The pain eventually passed off"

fade, wither - lose freshness, vigor, or vitality; "Her bloom was fading"

skip town, take a powder - disappear without notifying anyone (idiom)

die off, die out - become extinct; "Dinosaurs died out"

desorb - go away from the surface to which (a substance) is adsorbed

dematerialise, dematerialize - become immaterial; disappear

clear - go away or disappear; "The fog cleared in the afternoon"

bob under - disappear suddenly, as if under the surface of a body of water

end, cease, terminate, finish, stop - have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical; "the bronchioles terminate in a capillary bed"; "Your rights stop where you infringe upon the rights of other"; "My property ends by the bushes"; "The symphony ends in a pianissimo"

vaporize, vanish, fly - decrease rapidly and disappear; "the money vanished in las Vegas"; "all my stock assets have vaporized"

elapse, glide by, go by, slide by, slip by, slip away, go along, pass, lapse - pass by; "three years elapsed"

end, cease, terminate, finish, stop - have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical; "the bronchioles terminate in a capillary bed"; "Your rights stop where you infringe upon the rights of other"; "My property ends by the bushes"; "The symphony ends in a pianissimo"

decrease, diminish, lessen, fall - decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fall to under a hundred pounds"; "his voice fell to a whisper"

fell, vanish, fly - pass away rapidly; "Time flies like an arrow"; "Time fleeing beneath him"