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 啪嗒聲 · 話術（順口的一套說詞）
patter
n, vThink of one raindrop hitting a window: a tiny tap. Then another, and another, faster and faster. Each sound is far too small to notice on its own, but together they make a light, quick, repeating run of taps that you cannot miss. That run of taps is what patter holds — rain on glass, bare feet crossing a wooden floor, a small dog's in the kitchen. Nothing in the picture is heavy. The noun names the run of sounds; the verb names the thing making them.
From the word’s history
Wiktionary records this patter as pat (one light tap) plus the frequentative ending -er, first seen around the 1610s, and describes the word as imitating the sound itself. One light tap is pat; tapping again and again is patter.
字典記載這個 patter 是 pat（輕拍一下）加上表示「一再重複」的字尾 -er，大約 1610 年代出現，而且本身就是模仿聲音造出來的字。拍一下叫 pat，一直拍不停就成了 patter——這條線索跟今天的用法完全對得上。
Wiktionary, patter etymology 1 (source_ref kaikki:3f6f69a190036ae4:1172242367): "1610s, pat + -er (frequentative), of onomatopoeia origin"
A second word, same spelling
patter
n, vPicture a market seller who has said the same words every night for ten years. He does not think about them any more. They come out fast, smooth, with a joke in the same place each time and no gaps anywhere. The talk is ready-made and it runs by itself. That ready-made, non-stop run of words is this patter — a seller's, a show host's, a magician's. It is not a claim that the speaker is lying; it is a claim that the words were prepared long before you walked up.
From the word’s history
Wiktionary treats this as a separate word from the sound one: the noun is attested in 1758, first used of the cant of thieves and beggars, and the verb comes from Middle English pateren, which meant to rattle through the Lord's Prayer. Words said so often that they run by themselves is the thread you can still hear in sales patter.
字典把這個 patter 當成跟「雨聲」那個完全不同的字：名詞大約 1758 年出現，最早指小偷和乞丐之間的黑話；動詞來自中古英語 pateren，早期指「快速地把主禱文念過去」。念到滾瓜爛熟、不用想就一路念完——這條線索今天還留在 sales patter 裡面。
Wiktionary, patter etymology 2 (source_ref kaikki:3f6f69a190036ae4:1172255956): "Noun is from Middle English pater, verb is from Middle English pateren. Noun attested 1758, originally referring to the cant of thieves and beggers."
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