daunting

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Yet this would be a daunting undertaking.
而這將是一個艱巨的任務。
"If I was doing it myself it would be rather daunting, " she said.
她說，“如果是我一個人來做，那可能會讓我生畏。
The scripts need to evolve with the project so the task of creating should not be as daunting as when they are put off until the end a project.
腳本必須隨著項目的進行而持續加以改進，衹有這樣，才不會在項目結束時發現有一大堆讓人生畏的創建任務需要完成。

MSF is known for its daunting missions, for treating overwhelming numbers of victims with limited resources in often deplorable conditions.
It's not a daunting book. It's meant for laypeople.
不是一本讓人生畏的書，是專門爲普通人寫的。
普林斯頓公開課 - 人性課程節選
But,there was a big problem, that for all of his failings,human failings, and there were indeed many, and his intellectual limitations which were daunting, he was a man of faith and loyalty to his principles, for better or for worse,in this context.
但是他的弱點,人性的弱點,是個大問題,而且他的弱點確實很多,還有他的智力界限也令人沮喪,他是個固執於自己原則的人,不琯原則是好是壞
耶魯公開課 - 1871年後的法國課程節選

The challenge was daunting: The electronics and entertainment giant was struggling with red ink and management paralysis.
FORBES: It Takes a Crisis

making you feel slightly frightened or worried about your ability to achieve something

Something that is daunting makes you feel slightly afraid or worried about dealing with it.