- disposable (adj.)
[disposable 词源字典]
- 1640s, "that may be done without;" see dispose + -able. Meaning "designed to be discarded after one use" is from 1943, originally of diapers, soon of everything; replaced throw-away (1928) in this sense. First recorded use of disposable income (preserving the older sense) is from 1948.[disposable etymology, disposable origin, 英语词源]