思いがけなく、突然{とつぜん}、いきなり、出し抜けに、不意{ふい}に、予告{よこく}なしに、前ぶれなしに、藪から棒に、にわかに、唐突{とうとつ}に◆【同】out of a clear (blue) sky Cathy got a call from her old school friend out of the blue. キャシーは思いがけなく古い学友から電話をもらった。 Out of the blue, John asked Susan to marry him. ジョンは、何の前触れもなく突然、スーザンにプロポーズした。
out 1out n. 《米》 不和; 〔野球〕 アウト. 【形容詞 名詞+】 He's that rare exception: a pitcher
blue 1blue n. 青色; 青空. 【動詞+】 get one's blue (オックスフォードとケンブリッジで)対校競技の選手となる
appear out of the blue (突然に)現れる Proper eating habits don't magically appear out of the blue. きちんとした食習慣は魔法のように現れるわけではない。
bolt out of the blue 《a ~》青天のへきれき、寝耳{ねみみ}に水(の出来事{できごと})、降って湧いた出来事、思いがけない出来事、不覚{ふかく}の災難{さいなん} Even after a year of dating, his proposal was a bolt from [out of] the blue. 1年間つきあっていたとはいえ、彼のプロポーズは晴天のへきれきだった。
in a way that was not expected; "her brother showed up at the wedding out of the blue" Synonyms: unexpectedly, unexpectedly,
in a way that was not expected; "her brother showed up at the wedding out of the blue" Synonyms: unexpectedly, unexpectedly,
Adjective
not anticipated; "unanticipated and disconcerting lines of development"- H.W.Glidden; "unforeseen circumstances"; "a virtue unlooked-for in people so full of energy"; "like a bolt out of the blue" Synonyms: unanticipated, unforeseen, unlooked-for,