vacantyoudaoicibaDictYouDict[vacant 词源字典]
vacant: [13] Latin vacāre meant ‘be empty’. Its present participle vacāns has provided English with vacant, while its past participle lies behind English vacate [17] and vacation [14]. It also formed the basis of an adjective vacuus ‘empty’, from which English gets vacuous [17] and vacuum [16] (the term vacuum cleaner is first recorded in 1903, and the consequent verb vacuum in 1922). English avoid and void come from a variant of Latin vacāre.
=> vacate, vacuum[vacant etymology, vacant origin, 英语词源]
HooveryoudaoicibaDictYouDict
proprietary name for a make of vacuum cleaner (patented 1927); sometimes used generally for "vacuum cleaner." As a verb, meaning "to vacuum," from 1926, in the company’s advertising.
vacyoudaoicibaDictYouDict
1709 as a colloquial shortening of vacation (n.); 1942 as a colloquial shortening of vacuum (v.); 1974 as a colloquial shortening of vacuum cleaner.
vacuum (v.)youdaoicibaDictYouDict
"to clean with a vacuum cleaner," 1919, from vacuum (n.). Related: Vacuumed; vacuuming.
vacuum (n.)youdaoicibaDictYouDict
1540s, "emptiness of space," from Latin vacuum "an empty space, vacant place, a void," noun use of neuter of vacuus "empty, unoccupied, devoid of," figuratively "free, unoccupied," related to vacare "be empty" (see vain). Properly a loan-translation of Greek kenon, literally "that which is empty." Meaning "a space emptied of air" is attested from 1650s. Vacuum tube "glass thermionic device" is attested from 1859. Vacuum cleaner is from 1903; shortened form vacuum (n.) first recorded 1910.
The metaphysicians of Elea, Parmenides and Melissus, started the notion that a vacuum was impossible, and this became a favorite doctrine with Aristotle. All the scholastics upheld the maxim that "nature abhors a vacuum." [Century Dictionary]