3 adjectives to describe quietus

He knew that Agatha must be ill; and that there is no more efficient quietus to wildish meditations than the heating of hot-water bottles and the administration of hypnotics he had long ago discovered.

Could I even have thought of annihilation, or a total dissolution of soul as well as body, the gloomy thoughts of having no further being, no knowledge of what we hoped for, but an eternal quietus, without life or sense: even that, I say, would have been enough to strike me with horror and confusion!

Suppose it in material danger (mariners have some superstition about sentiments) of being tossed over in a fresh gale to some propitiatory shark (spirit of Saint Gothard, save us from a quietus so foreign to the deviser's purpose!)

3 adjectives to describe  quietus