Decrease and Disappear

noun

• A change downward.
  • usage: "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
  • synonyms: lessening, drop-off
• A process of becoming smaller or shorter.
  • synonyms: decrement
• The amount by which something decreases.
  • synonyms: decrement
• The act of decreasing or reducing something.
  • synonyms: diminution, reduction, step-down

verb

• Decrease in size, extent, or range.
  • usage: "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
  • synonyms: diminish, lessen, fall
• Make smaller.
  • usage: "He decreased his staff"
  • synonyms: lessen, minify

• (v.t.) To cause to grow less; to diminish gradually; as, extravagance decreases one's means.
• (v.) A becoming less; gradual diminution; decay; as, a decrease of revenue or of strength.
• (n.) To grow less, -- opposed to increase; to be diminished gradually, in size, degree, number, duration, etc. or in strength, quality or excellence; as, they days decrease in length from June to December.
• (v.) The wane of the moon.

verb

• Get lost, as without warning or explanation.
  • usage: "He disappeared without a trace"
  • synonyms: vanish, go away
• Become invisible or unnoticeable.
  • usage: "The effect vanished when day broke"
  • synonyms: vanish, go away
• Cease to exist.
  • usage: "An entire civilization vanished"
  • synonyms: vanish
• Become less intense and fade away gradually.
  • usage: "her resistance melted under his charm"; "her hopes evaporated after years of waiting for her fiance"
  • synonyms: melt, evaporate

• (v.i.) To cease to appear or to be perceived; to pass from view, gradually or suddenly; to vanish; to be no longer seen; as, darkness disappears at the approach of light; a ship disappears as she sails from port.
• (v.i.) To cease to be or exist; as, the epidemic has disappeared.