decrease, decrement - a process of becoming smaller or shorter

decline in quality, worsening, declension, deterioration - process of changing to an inferior state

ebb, ebbing, wane - a gradual decline (in size or strength or power or number)

erosion - a gradual decline of something; "after the accounting scandal there was an erosion of confidence in the auditors"

loss - gradual decline in amount or activity; "weight loss"; "a serious loss of business"

sinking spell - a temporary decline in health or value

slippage - decline from a standard level of performance or achievement

condition, status - a state at a particular time; "a condition (or state) of disrepair"; "the current status of the arms negotiations"

disuse, neglect - the state of something that has been unused and neglected; "the house was in a terrible state of neglect"

twilight - a condition of decline following successes; "in the twilight of the empire"

wreck - something or someone that has suffered ruin or dilapidation; "the house was a wreck when they bought it"; "thanks to that quack I am a human wreck"

decrease, decrement - a process of becoming smaller or shorter

exponential decay, exponential return - a decrease that follows an exponential function

downhill - the downward slope of a hill

incline, slope, side - an elevated geological formation; "he climbed the steep slope"; "the house was built on the side of the mountain"

steep - a steep place (as on a hill)

inflame - become inflamed; get sore; "His throat inflamed"

sicken, come down - get sick; "She fell sick last Friday, and now she is in the hospital"

degenerate, deteriorate, devolve, drop - grow worse; "Her condition deteriorated"; "Conditions in the slums degenerated"; "The discussion devolved into a shouting match"

change state, turn - undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election"

impoverish, deprive - take away

fail - get worse; "Her health is declining"

tumble - suffer a sudden downfall, overthrow, or defeat

drop away, fall away, slip, drop off - get worse; "My grades are slipping"

suffer - get worse; "His grades suffered"

lose, suffer - be set at a disadvantage; "This author really suffers in translation"

retrogress, regress, retrograde - get worse; fall back to a previous or worse condition

turn down - take a downward direction; "The economy finally turned down after a long boom"

freeze off, spurn, pooh-pooh, disdain, scorn, turn down, reject - reject with contempt; "She spurned his advances"

dishonor, dishonour - refuse to accept; "dishonor checks and drafts"

bounce - refuse to accept and send back; "bounce a check"

react, respond - show a response or a reaction to something

freeze off, spurn, pooh-pooh, disdain, scorn, turn down, reject - reject with contempt; "She spurned his advances"

contract out - refuse to pay a levy to a union for political use

regret - decline formally or politely; "I regret I can't come to the party"

repudiate - refuse to recognize or pay; "repudiate a debt"

disobey - refuse to go along with; refuse to follow; be disobedient; "He disobeyed his superviser and was fired"

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"

dip - go down momentarily; "Prices dipped"

wear on - pass slowly (of time); "The day wore on"

drop - go down in value; "Stock prices dropped"

drop - to fall vertically; "the bombs are dropping on enemy targets"

sink, dip - appear to move downward; "The sun dipped below the horizon"; "The setting sun sank below the tree line"

come down, descend, go down, fall - move downward and lower, but not necessarily all the way; "The temperature is going down"; "The barometer is falling"; "The curtain fell on the diva"; "Her hand went up and then fell again"

inflect - change the form of a word in accordance as required by the grammatical rules of the language