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Decrease vs Impair - What's the difference?

decrease | impair | Related terms |

In transitive terms the difference between decrease and impair

is that decrease is to make (a quantity) smaller while impair is to weaken; to affect negatively; to have a diminishing effect on.

As verbs the difference between decrease and impair

is that decrease is of a quantity, to become smaller while impair is to weaken; to affect negatively; to have a diminishing effect on.

As a noun decrease

is an amount by which a quantity is decreased.

As an adjective impair is

not fit or appropriate.

decrease

English

Verb

(decreas)
  • Of a quantity, to become smaller.
  • To make (a quantity) smaller.
  • Synonyms

    * (become smaller) drop, fall, go down, plummet (rapidly), plunge (rapidly), reduce, shrink, sink * (make smaller) abate, cut, decrement, lower, reduce

    Antonyms

    * (become larger) go up, grow, increase, rise, soar (rapidly), shoot up (rapidly) * (make larger) increase, increment, raise, up (informal)

    Noun

    (en noun)
  • An amount by which a quantity is decreased.
  • (knitting) A reduction in the number of stitches, usually accomplished by suspending the stitch to be decreased from another existing stitch or by knitting it together with another stitch. See .
  • Synonyms

    * (amount by which a quantity is decreased) cut, decrement, drop, fall, loss, lowering, reduction, shrinkage

    Antonyms

    * (amount by which a quantity is decreased) gain, increase, increment, raise , rise

    impair

    English

    Alternative forms

    * (l) (qualifier)

    Verb

    (en verb)
  • To weaken; to affect negatively; to have a diminishing effect on.
  • (archaic) To grow worse; to deteriorate.
  • (Milton)

    Derived terms

    * (l)

    Adjective

    (en adjective)
  • (obsolete) Not fit or appropriate.