useful
adj.
1590s, from use, n. + -full. Related: Usefully; usefulness.
〔李〕[use n. 用；-ful ⇒“that can be of use可用的”→] a. of use；helpful有用的；有益的
〔李〕[use n. 用；-ful ⇒“that can be of use可用的”→] a. of use；helpful有用的；有益的
| 词汇 | useful |
| 词根词缀 | Online Etymology Dictionary 词根李平武蒋争 useful adj. 1590s, from use, n. + -full. Related: Usefully; usefulness. 〔李〕[use n. 用；-ful ⇒“that can be of use可用的”→] a. of use；helpful有用的；有益的 |
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