一有動靜就彈開
這一群保留了最完整的畫面：先有一個小小的刺激，接著是一個大大的、突然的閃避。差別只在閃避的是四條腿，還是手上的錢。
adjective · C1
Used about an animal, especially a horse, that gets excited or frightened very easily and jumps or moves away suddenly at a small sound or movement.
易受驚的；一驚就跳開的
核心畫面
One way to hold it: a horse that jumps sideways at a shadow. The thing on the ground is only a paper bag, and the whole animal is already three steps away. The move is quick, sideways, and comes with no warning, because the reaction is set far lighter than the cause. Hold that lightness, and the word travels: a body can jump like that, and so can a mood, an opinion, or a room full of people watching prices.
「skittish」的畫面可以想成一匹馬突然往旁邊一跳。地上其實只有一張紙、一個影子，牠卻整個彈開。動作是橫的、快的…更多收起
「skittish」的畫面可以想成一匹馬突然往旁邊一跳。地上其實只有一張紙、一個影子，牠卻整個彈開。動作是橫的、快的、沒有預告的。真正的重點在比例：刺激很小，反應很大。抓住這個「一點小事就彈開、定不住」的感覺，這個字就走得很遠——身體可以這樣跳，心意可以這樣跳，一整個市場裡的人也可以這樣跳。From the word’s history
The packet says the word probably comes from the dialect word skite, meaning to move suddenly and at an angle, plus -ish, and points to skitter as a relative. If that is right, the darting sideways movement sits in the word from the start, and fear is only the commonest reason for it.
手上的資料說 skittish 可能來自方言字 skite（突然、斜斜地竄開），加上 -ish，並指出它跟 skitter 是一家。如果是這樣，這個字從一開始講的就是那個「橫著一竄」的動作本身，害怕只是最常見的原因。來源上寫的是 probably，所以這是一種推測，不是定論。
Wiktionary (kaikki extract) 'skittish' etymology_text: Probably from skite (to move lightly and hurriedly; to move suddenly, particularly in an oblique direction) + -ish; compare skitter. Marked 'probably' in the source.
Two branches
定不下來、沒個準
一樣是那個輕輕一跳，但這次跳的不是身體，而是心意；也不是被嚇的，而是本來就停不住。
adjective · C1
Used about a person who is not very serious, and whose feelings, behaviour and opinions keep changing from one thing to another.
反覆無常的；定不下來的