There is pronounced THAIR (IPA /ðɛər/). Voiced 'th' — tongue between teeth with vocal-cord buzz, then 'air'.
IPA: /ðɛər/
Syllables: THAIR
In 406 attempts by 220 learners scored in the SayWhat app, the sound most often scored red in this word was /ɹ/ (28% of attempts).
Common ESL mistake: Learners say 'der' replacing voiced /ð/ with /d/.
Tip: Voiced 'th' — tongue between teeth with vocal-cord buzz, then 'air'.