lockdown
n.
also lock-down, from 1940s in various mechanical senses, from lock, v. + down, adv.. Prison sense is by 1975, American English.
| 词汇 | lockdown |
| 词根词缀 | Online Etymology Dictionary lockdown n. also lock-down, from 1940s in various mechanical senses, from lock, v. + down, adv.. Prison sense is by 1975, American English. |
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