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If a piece of work is masterly, it is done with great skill — as if a true master made it. A masterly performance is not just good; it is beautifully controlled. This is a slightly word. You see it in reviews more than in daily chat. Though actually, English also has masterful, and people mix the two. Older careful use said masterly = very skilled, and masterful = taking charge, even a bit . Many speakers now use masterful to mean “skilled” as well. If you want to praise the skill, masterly is the clearer word.
精湛的、高明的（指做法很出色，不是「愛管人」）
組成From Middle English maisterli: maister (master) + -li (the old form of -ly, making an adjective). Master itself comes from Old English mægester and Old French maistre, both from Latin magister (teacher, master), ultimately from a Proto-Indo-European word for “big.”
同家族的字
- masterthe skilled person the adjective comes from
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
masterlyadj詞源 1/ˈmɑːstəli/
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Executed in the manner of a master; showing competence and skill; masterful.
- Her years of experience enabled her to render a masterly performance.
- He made confeſsion of you, / And gaue you ſuch a maſterly report / For art and exerciſe in your defence, / And for your Rapier moſt eſpeciall, / That he cride out t' would be a ſight indeed / If one could match you; [...]
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derogatoryobsoleteLike a master; arbitrary; domineering, imperious.
- The godlie counſels of Salomon and Ieſus the ſonne of Sirach, for ſharpe kepinge in, and bridleinge of youth, are ment rather, for fatherlie correction, then maſterlie beating, rather for maners, than for learninge: for other places, than for ſcholes.
- Many times fear is a profitable and an active ſervant, if it do not dominere and grow maſterlie.
masterlyadv詞源 2/ˈmɑːstəli/
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archaicIn a masterful manner; competently, masterfully.
- At length the sound of a flute broke upon mine ear; it was not played masterly, but the tones were very sweet; and what is more correct, perhaps, they harmonized with my feelings.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。