What is the symbol to denote long vowel sounds?

There isn't a single, universal symbol to denote long vowel sounds. The way long vowels are indicated depends on the system of phonetic transcription being used.

Here are some common methods:

1. IPA (International Phonetic Alphabet):

* Length marks: A colon (:) is added after the vowel symbol to indicate a long vowel sound. For example:

* /i:/ (long i)

* /a:/ (long a)

* /u:/ (long u)

2. Dictionary markings:

* Double vowels: Two identical vowels are used to represent a long vowel sound. For example:

* "ee" for long e (as in "see")

* "oo" for long o (as in "moon")

3. Other systems:

* Macrons: A horizontal line (¯) placed above the vowel symbol can indicate a long vowel sound. This is more common in languages like Spanish, where it is a standard part of the orthography.

* Breves: A short horizontal line (˘) above the vowel symbol can indicate a short vowel sound.

Important to note: The specific symbol or combination of symbols used for a long vowel sound can vary depending on the context and the specific phonetic system being used.

If you're unsure how a long vowel sound is represented, it's always best to consult the specific phonetic transcription system being used.