這個拼法底下其實是2個不同的字，意思沒有關係， 只是長得一樣。下面分開列出來。跳到 flower or leaf bud · friend, buddy (casual)
bud
noun, verbOne picture holds this whole side of the word: a small closed lump on the side of something living, with more inside it than you can see. On a branch in February it is grey and hard and no bigger than a rice grain, and a whole flower is folded up in there. Two things follow from that picture. First, a bud is a stage, not a kind of thing: the name lasts only until it opens. Second, it is always growing out of something else, never standing alone — which is why a science class can use the same word for the lump on the side of a yeast cell. Turn the picture into an action and you get the verb: to put out those lumps.
From the word’s history
The packet's Wiktionary entry traces this bud to Middle English budde ('bud, seed pod'), from Old English, and suggests a much older root meaning 'to swell'. If that root is right, the oldest idea in the word is simply something swelling out, which fits the closed, rounded lump the modern word still names.
封包裡的來源把這個 bud 追到中古英文 budde（花苞、種莢），再往上到古英文，並提到更早的字根可能有「鼓起來」的意思。如果這條線索沒錯，這個字最老的想法就只是「鼓出來的東西」——這正好對得上它今天指的那個圓圓的、關著的小包。
packet evidence: Wiktionary entry for bud (etymology 1), source_ref kaikki:3f6f69a190036ae4:568091951
A second word, same spelling
bud
nounThis bud has nothing to do with plants, so it is worth holding a separate picture for it. Think of a word that has been cut short because it gets said so often: buddy, trimmed down to one quick syllable you can call across a car park. That shortness is the whole feel of it. It is warm, it is fast, and it does not need a name — you can use it on a friend of twenty years or on a man you have never met, and in both cases you are saying the same thing: we are on easy terms here.
From the word’s history
The packet's Wiktionary entry marks this bud as a back-formation from buddy, and files it under a separate etymology from the plant word. So the two buds only look alike; they do not share a history.
封包裡的 Wiktionary 把這個 bud 標為 buddy 的逆構詞（back-formation），而且放在跟植物那個 bud 不同的詞源底下。所以這兩個 bud 只是長得一樣，並沒有共同的來歷。
packet evidence: Wiktionary entry for bud (etymology 2, noun), source_ref kaikki:3f6f69a190036ae4:568174976 ("Back-formation from buddy.")
登入就可以看每一支怎麼連回核心畫面。