senescent

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++se·nes·cent /səˈnesənt/ adjective technical  OLD/NOT YOUNGbecoming old and showing the effects of getting older 变老的，衰老的 SYN ageing a senescent industry 衰落的行业 —senescence noun [uncountable]

Examples from the Corpus

senescent• Mr Lee seemed a gentleman, but senescent, and a gentleman from quite another, distant age.• Unusual numbers of dead holly trees with senescent branches or main trunks; 2.• His brief was to convey coal as a developing rather than a senescent industry.• I stopped walking and stared wide-eyed as the rest of the senescent strollers proceeded out of this dimension.From Longman Business Dictionarysenescentse‧nes‧cent /səˈnesənt/ adjective formal getting older and showing the effects of thisCoal is often viewed as a senescent industry.Origin senescent (1600-1700) Latin present participle of senescere “to grow old”, from senex; → SENIOR1

se·nes·cent adjectiveChineseSyllable  

the effects old of Business Corpus and showing becoming

senescent
se‧nes‧cent /səˈnesənt, sɪˈnesənt/ adjective technicalbecoming old and showing the effects of getting older
   SYN  ageing:
    a senescent industry
—senescence noun [uncountable]