θ

/ˈθɜːz.deɪ/

Thursday

/ɜːθ/

earth

/fɔːθ/

fourth

/ˈθɪə.tə(r)/

theatre

How do we produce /θ/?

It's a voiceless consonant sound. Put your tongue between the upper and lower teeth, then stick the tongue just a little bit. Open your mouth just a little. Try to push the air through the gap between your tongue and top teeth. Do not move your tongue.

/θɪŋ/

thing

/streŋθ/

strength