ずいぶん

(1) 適度に十分な範囲、または程度(to a moderately sufficient extent or degree; "pretty big"; "pretty bad"; "jolly decent of him"; "the shoes are priced reasonably"; "he is fairly clever with computers")(to a moderately sufficient extent or degree)

⇒彼はコンピュータにかなり優れている(to a moderately sufficient extent or degree)

(2) 高度または広範囲に好意的な、または非常に敬意を持って(to a high degree or extent; favorably or with much respect; "highly successful"; "He spoke highly of her"; "does not think highly of his writing"; "extremely interesting")(to a high degree or extent)(favorably or with much respect)

⇒極めて興味深い(favorably or with much respect)

(3) 強意語として使われる(used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal; "she was very gifted"; "he played very well"; "a really enjoyable evening"; "I'm real sorry about it"; "a rattling good yarn")(used as intensifiers)

⇒活発な面白い冒険談(used as intensifiers)

(4) (used as intensifiers; "terribly interesting"; "I'm awful sorry")

⇒すごく残念である(used as intensifiers)

(5) 異常に目立つ、または、例外的な、または、驚くべき種の（否定的には使用されない）(of an unusually noticeable or exceptional or remarkable kind (not used with a negative); "her victory was quite something"; "she's quite a girl"; "quite a film"; "quite a walk"; "we've had quite an afternoon")(of an unusually noticeable or exceptional or remarkable kind (not used with a negative))

⇒私たちはすばらしい午後を過ごした(of an unusually noticeable or exceptional or remarkable kind (not used with a negative))

(6) 極端に(to an extreme degree; "extremely cold"; "extremely unpleasant")(to an extreme degree)

⇒極めて不愉快な(to an extreme degree)

(7) かなり（否定的には使用されない）(to a degree (not used with a negative); "quite tasty"; "quite soon"; "quite ill"; "quite rich")(to a degree (not used with a negative))

⇒かなり金持ち(to a degree (not used with a negative))

(8) 非常に大きい程度や範囲まで(to a very great degree or extent; "I feel a lot better"; "we enjoyed ourselves very much"; "she was very much interested"; "this would help a great deal")(to a very great degree or extent)

⇒これは、非常に助けになるだろう(to a very great degree or extent)

(9) ある（多い、または、少ない）程度において(to some (great or small) extent; "it was rather cold"; "the party was rather nice"; "the knife is rather dull"; "I rather regret that I cannot attend"; "He's rather good at playing the cello"; "he is kind of shy")(to some (great or small) extent)

⇒彼はちょっと内気である(to some (great or small) extent)