The state of being tranquil — a pleasant, settled calm. It is the noun of 'tranquil', uncountable, and it names the quality itself: the tranquillity of the countryside, disturbed the tranquillity of the afternoon, found tranquillity after years of stress.

The state of being tranquil「tranquil」（寧靜的）這種狀態 — a pleasant, settled calm一種舒服、安定下來的平靜。 It is the noun of 'tranquil', uncountable它是 tranquil 的名詞，不可數, and it names the quality itself指的就是這種特質本身: the tranquillity of the countryside像 the tranquillity of the countryside（鄉間的寧靜）, disturbed the tranquillity of the afternoon、disturbed the tranquillity of the afternoon（打擾了午後的寧靜）, found tranquillity after years of stress、found tranquillity after years of stress（在多年壓力後找到平靜）。

It works in two directions. Outwardly it is about a place or a moment being still and peaceful; inwardly it is about a mind at rest, free from worry — which is why you meet it constantly in writing about meditation, retreats, and religion.

It works in two directions它可以用在兩個方向上。 Outwardly it is about a place or a moment being still and peaceful對外指的是一個地方或一個時刻很寧靜、很平和; inwardly it is about a mind at rest, free from worry對內指的是心靈安定、不再煩惱 — which is why you meet it constantly in writing about meditation, retreats, and religion這就是為什麼在講冥想、靜修、宗教的文章裡經常看到它。

English also has some set phrases with it: 'peace and tranquillity' is almost fixed, and the Moon's Sea of Tranquillity is where humans first landed in 1969.

English also has some set phrases with it英文裡也有一些固定用它的片語: 'peace and tranquillity' is almost fixed'peace and tranquillity'（寧靜祥和）幾乎已經固定成一個詞組, and the Moon's Sea of Tranquillity is where humans first landed in 1969而月球上的「寧靜海」（Sea of Tranquillity）就是1969年人類首次登陸的地方。

British writers spell it with two l's; Americans usually write 'tranquility' with one. Both are standard, and Taiwanese students who learn from a mix of textbooks will meet both spellings and should not panic.

British writers spell it with two l's英式英文拼成兩個 l; Americans usually write 'tranquility' with one美式英文通常只寫一個 l，也就是「tranquility」。 Both are standard兩種拼法都是標準的, and Taiwanese students who learn from a mix of textbooks will meet both spellings台灣學生用的教材來源不同，兩種拼法都會遇到 and should not panic不用緊張。