* th - /θ/
* r - /r/
* ou - /aʊ/
* gh - /ɡ/
* ou - /aʊ/
* t - /t/
Therefore, there are 6 phonemes in the word "throughout".
* th - /θ/
* r - /r/
* ou - /aʊ/
* gh - /ɡ/
* ou - /aʊ/
* t - /t/
Therefore, there are 6 phonemes in the word "throughout".