Their is pronounced THAIR (IPA /ðɛər/). It sounds identical to 'there' — voiced 'th' followed by 'air'.
IPA: /ðɛər/
Syllables: THAIR
Common ESL mistake: Learners pronounce 'th' as /d/ saying 'dare'.
Tip: It sounds identical to 'there' — voiced 'th' followed by 'air'.