Through is pronounced THROO (IPA /θruː/). Stick your tongue slightly out for /θ/, then say 'roo'.
IPA: /θruː/
Syllables: THROO
In 269 attempts by 23 learners scored in the SayWhat app, the sound most often scored red in this word was /θ/ (30% of attempts).
Common ESL mistake: Learners say 'troo' or 'froo', replacing /θ/ with /t/ or /f/.
Tip: Stick your tongue slightly out for /θ/, then say 'roo'.