Furtiveness is the noun: the quality, or the air, of being furtive.

Furtivenessfurtiveness is是 the noun名詞: the quality, or the air就是那種特質，或那股氣息 of being furtive鬼鬼祟祟的樣子.

You might speak of the furtiveness of his glance, or say there was a furtiveness about her as she left. It names that secret, slightly guilty manner as a thing in itself.

You might speak of你可能會說 the furtiveness of his glance他那一瞥裡的鬼祟, or say there was a furtiveness about her as she left或說她離開時整個人帶著一股鬼祟感. It names that secret, slightly guilty manner它指的就是那種偷偷摸摸、帶點心虛的態度 as a thing in itself本身這件事.

It is much rarer than furtive or furtively, and it sounds a little formal — the sort of word you meet in a novel or a careful report, not in the playground. Most of the time, the adjective is the word you actually need.

It is它 much rarer than furtive or furtively比furtive或furtively少見很多, and it sounds a little formal聽起來也比較正式 — the sort of word you meet in a novel or a careful report是那種你會在小說或字斟句酌的報導裡遇到的字, not in the playground不會在操場上聽到. Most of the time大多時候, the adjective is the word you actually need你真正需要的其實是那個形容詞.

Though actually, when a writer does choose the noun, they are often pointing at a pattern, not one look: a habit of hiding, a lasting air of not wanting to be seen.

Though actually不過, when a writer does choose the noun當作者真的選了這個名詞時, they are often pointing at a pattern他們通常是在指一種固定的模式, not one look而不是單一的一眼: a habit of hiding一種躲躲藏藏的習慣, a lasting air of not wanting to be seen一種不想被看見的、持續的氣息.