Decrease and Underestimate

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.

noun

• An estimation that is too low; an estimate that is less than the true or actual value.
  • synonyms: underestimation, underrating, underreckoning

verb

• Assign too low a value to.
  • usage: "Don't underestimate the value of this heirloom-you may sell it at a good price"
  • synonyms: undervalue
• Make a deliberately low estimate.
  • usage: "The construction company wanted the contract badly and lowballed"
  • synonyms: lowball
• Make too low an estimate of.
  • usage: "he underestimated the work that went into the renovation"; "Don't underestimate the danger of such a raft trip on this river"
  • synonyms: underrate

• (n.) The act of underestimating; too low an estimate.
• (v.t.) To set to/ low a value on; to estimate below the truth.