- (Hà Nội) IPA(key): [tʰɨ̞̠˧ˀ˦ tɨ̞̠˧˧]
- (Huế) IPA(key): [tʰɨ̞̠ɰ˩ˀ˧ tɨ̞̠ɰ˧˧]
- (Hồ Chí Minh City) IPA(key): [tʰɨ̞̠ɰ˦ˀ˥ tɨ̞̠ɰ˧˥]
From thứ (“-th”) + tư (“four”). In the sense of “fourth”, sometimes bốn is used instead of tư. Even though the name suggests it is the fourth day of the week, Wednesday is actually considered the third one.