Erstwhile
//ˈɝst.waɪl//
Pronunciation
US //ˈɝst.waɪl//
US //ˈɝst.waɪl//
US
Syllables: 2
Phonemes: ER1 S T W AY2 L
UK //ˈɜː(ɹ)st.waɪl//
UK //ˈɜː(ɹ)st.waɪl//
More for "erstwhile"
Next best steps
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.