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The little wavy line ~ written above a letter. In Spanish it sits over an n — ñ — and changes the sound: 'n' becomes something like the 'ny' in 'canyon'. That is why Spanish 'año' (year) and 'ano' are two very different words, and why Spanish speakers care about this mark. Portuguese uses it too, over , to make them nasal (São Paulo). Pronounce the English word roughly 'TIL-də'. Two extra things worth knowing, because you will meet them. Spanish speakers themselves use the word 'tilde' more widely than English does — for them it covers the accent mark on é as well. And in computers and maths the same wavy line does other jobs entirely: it sits on the keyboard as a plain character, it stands for 'your home folder' in a computer path (~/Documents), and in writing it means 'about, roughly' — ~50 people means around fifty. When it stands alone like that, English speakers usually just call it 'squiggle' or 'the wavy line' in speech, even though 'tilde' is the proper name.
波浪號、鼻音符（西班牙文 ñ 上面那一撇波浪）；電腦上的「~」符號台灣多半直接唸「波浪號」
組成Borrowed from Spanish tilde, which came from Latin titulus, meaning a heading or a superscript — something written above. It is a doublet of 'title': the same Latin word travelled into English twice by different roads, once as the name of a book's heading and once as the name of a mark written over a letter.
原始詞典資料10 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
tildenoun/ˈtɪldə/
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A diacritical mark ⟨˜⟩ placed above a letter to modify its pronunciation.
- California, like several other states, prohibits the use of diacritical marks or accents on official documents. That means no tilde (~), no accent grave (`), no umlaut (¨) and certainly no cedilla (¸).
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A diacritical mark ⟨˜⟩ placed above a letter to modify its pronunciation.
- The tilde was used similarly in Portuguese on vowels to show that the letter bearing the tilde should be pronounced nasally.
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A diacritical mark ⟨˜⟩ placed above a letter to modify its pronunciation.
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A diacritical mark ⟨˜⟩ placed above a letter to modify its pronunciation.
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A symbol ⟨~⟩, with various names and uses, also known as swung dash or wave dash. In the computer industry, various other names may be used, such as squiggle and twiddle.
- swung dash A stock keyboard character, used in mathematics as the sign of similarity (a ~ b) and in lexicography as a sign of repetition. The same sign has been used in symbolic logic to indicate negation, but to avoid confusion, the angular negation symbol (¬) is preferred. Not to be confused with the tilde.
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A symbol ⟨~⟩, with various names and uses, also known as swung dash or wave dash. In the computer industry, various other names may be used, such as squiggle and twiddle.
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A symbol ⟨~⟩, with various names and uses, also known as swung dash or wave dash. In the computer industry, various other names may be used, such as squiggle and twiddle.
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A symbol ⟨~⟩, with various names and uses, also known as swung dash or wave dash. In the computer industry, various other names may be used, such as squiggle and twiddle.
另外 2 個記錄的用法
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A symbol ⟨~⟩, with various names and uses, also known as swung dash or wave dash. In the computer industry, various other names may be used, such as squiggle and twiddle.
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human-scienceslogicmathematicsA symbol ⟨~⟩, with various names and uses, also known as swung dash or wave dash. In the computer industry, various other names may be used, such as squiggle and twiddle.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。