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1. Oxford Dictionary

   decay

   • IPA[dɪˈkeɪ]

   英式

   • v.
     (of organic matter) rot or decompose through the action of bacteria and fungi；cause to rot or decompose
   • n.
     the state or process of rotting or decomposition；rotten matter or tissue

   • verb: decay, 3rd person present: decays, gerund or present participle: decaying, past tense: decayed, past participle: decayed

   • noun: decay, plural noun: decays

2. • 釋義

   v.

   動詞

   • 1. (of organic matter) rot or decompose through the action of bacteria and fungi the body had begun to decay 同義詞 decompose, rot, putrefy, go bad, go off, ... 更多spoil, fester, perish, deteriorate, degrade, break down, break up, moulder, shrivel, shrivel up, wither, technicalmortify, necrotize, sphacelate, archaiccorrupt
   • ▪ cause to rot or decompose the fungus will decay soft timber
   • ▪ fall into disrepair; deteriorate facilities decay when money is not spent on refurbishment 同義詞 deteriorate, degenerate, decline, go downhill, slump, ... 更多slip, slide, go to rack and ruin, go to seed, run to seed, worsen, crumble, disintegrate, fall to pieces, come apart at the seams, fall into disrepair, become dilapidated, fail, wane, ebb, dwindle, collapse, informalgo to pot, go to the dogs, hit the skids, go down the tubes, go down the toilet, go to the pack反義詞 improve
   • ▪ decline in quality, power, or vigour the moral authority of the party was decaying
   • ▪ (of a radioactive substance, particle, etc.) undergo change to a different form by emitting radiation the trapped radiocarbon begins to decay at a known rate the W-particle then decays into an electron and a neutrino
   • ▪ (of a physical quantity) undergo a gradual decrease the time taken for the current to decay to zero

   n.

   名詞

   • 1. the state or process of rotting or decomposition hardwood is more resistant to decay than softwood bacterial decay 同義詞 decomposition, rotting, going bad, putrefaction, putrescence, ... 更多putridity, festering, spoilage, perishing, withering, shrivelling, rot, mould, mildew, fungus, archaiccorruption, rot, rotting, corrosion, corroding, decomposition, caries, cavities, holes, rarecariosity
   • ▪ rotten matter or tissue fluoride heals small spots of decay
   • ▪ structural or physical deterioration the old barn rapidly fell into decay 同義詞 deterioration, degeneration, debasement, degradation, decline, ... 更多slipping, waning, ebb, shrinking, withering, weakening, atrophy, crumbling, disintegration, collapse, lapse, fall, failure, formaldevolution, dateddecadence反義詞 improvement
   • ▪ the process of declining in quality, power, or vigour the problems of urban decay
   • ▪ the change of a radioactive substance, particle, etc. into another by the emission of radiation the gas radon is produced by the decay of uranium in rocks and soil he developed a detector for decays of carbon-14
   • ▪ gradual decrease in the magnitude of a physical quantity the required time constant for current decay is 1 ms