Decorous describes behaviour or appearance that is right for the occasion: polite, calm, and a little careful. A decorous silence at a funeral; decorous clothes at a ceremony.

decorousDecorous describes behaviour or appearance that is right for the occasion形容一種符合場合的行為或外表：polite, calm, and a little careful有禮貌、沉穩，又帶點小心翼翼。a decorous silence at a funeral像『decorous silence at a funeral』（喪禮上得體的沉默）；decorous clothes at a ceremony『decorous clothes at a ceremony』（典禮上合宜的服裝）。

It is a formal, slightly old-fashioned word. Younger people almost never say it in casual talk; they would say proper, polite, or well-behaved.

it is a formal, slightly old-fashioned word這是個正式、有點舊式的字。younger people almost never say it in casual talk年輕人在輕鬆對話裡幾乎不會這樣說；they would say他們會說 proper, polite, or well-behavedproper、polite，或well-behaved。

Though actually, decorous is not the same as good, and it is not the same as decorate, even though the spelling looks related. Laughing loudly can be warm and kind at a party and still not be decorous at a formal dinner.

though actually不過其實，decorousdecorous is not the same as good跟good不一樣，and it is not the same as decorate也跟decorate不一樣，even though the spelling looks related儘管拼法看起來有關聯。laughing loudly在派對上大聲笑 can be warm and kind at a party可以是溫暖又親切的，and still not be decorous at a formal dinner但在正式晚宴上這樣做還是稱不上decorous。

The word is about fitting the room you are in, and it often carries a faint smell of old rules and 'what people will think.' You can be kind and still not decorous; you can be decorous and still cold.

the word is about fitting the room you are in這個字講的是跟你所在場合搭不搭，and it often carries a faint smell of old rules and 'what people will think'而且常常帶著一點舊規矩和『別人會怎麼想』的味道。you can be kind and still not decorous你可以很親切卻稱不上decorous；you can be decorous and still cold也可以很decorous卻很冷淡。