/O/
Found in words like: no, toe, soap, throw, though
Letters that usually represent it: “o,” “oe,” “oa,” “ow”
Similar to /u/’s case, this symbol is acceptable to use in a broad
transcription of English, but it really represents the sound that “o” makes
in the Spanish word “hola” or “gato.”
In English, the “o” is sound is typically more of a diphthong and can be
represented with something like [oʊ]. In Australian English, the sound is
more of an [ɔʊ].
https://oke.io/O7vMhN
https://oke.io/XSdmobQ1
DIPHTHONGS
So far, we have seen mostly symbols for pure vowels, and with these
symbols, we can represent almost any sound made in common accents of
English. However, English is a language known for being full of
diphthongs (double vowels) that are represented by combinations of
symbols.
Examples already given for this are [ʊu] and [oʊ], but there are many
more. Here are the most common examples:
/AJ/
Found in words like: my, wise, high, Thai, island
Letters that usually represent it: “i,” “y,” “igh,” “ai”
In Received Pronunciation, the diphthong is more of a /ɑj/ sound.
/EJ/
Found in words like: date, day, pain, whey, rein, neighbor
Letters that usually represent it: “a,” “ay,” “ai,” “ey,” “ei,” “eigh”
In Received Pronunciation, this diphthong is more of a /ɛj/ sound.