roughly
adv.
c.1300, "ungently, violently," from rough, adj. + -ly(2). Meaning "approximately, without precision or exactness" is from 1841.
| 词汇 | roughly | 
| 词根词缀 | Online Etymology Dictionary roughly adv. c.1300, "ungently, violently," from rough, adj. + -ly(2). Meaning "approximately, without precision or exactness" is from 1841. | 
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