The word "twaes" is a rare and archaic variant of "twice". This spelling originated in Old English, where the sound /kw/ was often spelled as "cwe" or "tw", while the vowel sound /i/ was spelled as "i" or "y". In IPA phonetic transcription, "twaes" would be transcribed as /twɑːs/. Despite its historical significance, the spelling "twaes" is no longer commonly used in modern English, where "twice" is the universally accepted form.