fetidness的音標是[?fet?dn?s]，基本翻譯是“惡臭的；難聞的”。速記技巧可以是：諧音記憶：“費笛奶死”。意思是：氣味難聞得要死。

fetidness的英文詞源是“feverish”（發熱的）和“odorous”（有氣味的）。這個詞的意思是“惡臭的”，表示一種令人不快的氣味。

fetidness的變化形式主要有兩種。一種是其名詞形式fetid，意思是“惡臭的”，通常用作形容詞fetidness的修飾詞。另一種是形容詞形式fetidly，表示“惡臭地”，通常用作副詞，修飾動詞或形容詞。

相關單詞方面，由于fetidness的含義與氣味有關，因此與“氣味”、“臭氣”、“臭味”等單詞較為相關。例如，stench（臭氣）、stenotypy（臭氣熏人）、pestilence（瘟疫，惡臭）等。這些單詞都與fetidness有著密切的聯系，可以用來描述令人不快的氣味。

具體來說，fetidness可以通過其詞源和變化形式來解釋為一種令人不快的氣味，這種氣味可能源于發熱或疾病等身體狀況，也可能是環境中的污染物或腐敗物質所產生。這種氣味可能會引起人們的反感和厭惡，因此fetidness也可以用來形容某人對某事或某人的厭惡或不喜歡的情感。

總之，fetidness作為一個具有豐富含義的詞匯，其英文詞源、變化形式和相關單詞都反映了其與氣味和情感之間的密切聯系。

fetidness 的常用短語：

1. be fetid with stench

2. be fetid in a particular way

3. be marked by fetidness

4. be reminiscent of fetidness

5. exude fetidness

6. have a fetid smell

7. have a foul fetid smell

例句：

1. The swamp was fetid with the smell of rotting vegetation.

2. The room was fetid in a way that suggested a lack of cleanliness and care.

3. The stench of the garbage in the alley was so fetid that it made her feel ill.

4. The smell of the decaying fish in the market was so strong that it was almost fetid.

5. The sweat on his brow was exuding a fetid smell that made her feel nauseous.

6. The dog"s breath had a fetid smell that no amount of brushing could mask.

7. The smell of rotten eggs was so strong that it was almost fetid in the cave.

英文小作文：

Fetidness is a unpleasant smell or quality that can make people feel uneasy or nauseous. It can be caused by things like rotten food, garbage, or decaying matter, and it can also be a sign of illness or infection. When I think of fetidness, I remember the smell of the swamp in the summer, when the vegetation rots and releases its foul smell into the air. It reminds me of how dirty and unclean things can be, and how we should try to keep ourselves and our environment clean and healthy. I hope we can avoid fetidness and live in a clean and healthy environment.