形容詞 decrepit:

1. worn and broken down by hard use
   同義詞：creaky, derelict, flea-bitten, run-down, woebegone
2. lacking physical strength or vitality
   同義詞：debile, feeble, infirm, rickety, sapless, weak, weakly

1. An old, rickety vehicle, especially a decrepit automobile or aircraft.
   破舊汽車，破舊飛機(jī)一種用久而破爛的交通工具，尤指破壞了的汽車或飛機(jī)

de.crep.it

adj.（形容詞）
Weakened, worn out, impaired, or broken down by old age, illness, or hard use.See Synonyms at weak
老朽的；用舊的：由于年老、疾病或使用而過度以至衰弱的、疲乏的、損害了的或出毛病了的參見 weak

來源：
Middle English
中古英語
from Old French
源自 古法語
from Latin dôcrepitus [worn out, feeble]
源自 拉丁語 dôcrepitus [耗盡的，虛弱的]
dô- [de-]
dô- [脫離]
crepitus [past participle of] crep3re [to burst, crack]
crepitus [] crep3re的過去分詞 [爆破，破裂]

【引伸】
decrep.itly
adv.（副詞）