/o/ can be heard as [ʊ] after labial stop consonants.
Iraralay Yami, spoken on the north coast, distinguishes between geminative consonants (e.g., opa 'thigh' vs. oppa 'hen' form one such minimal pair).[4]
↑Hammarström, Harald; Forkel, Robert; Haspelmath, Martin (eds.). "Yami". Glottolog . Jena, Germany: Max Planck Institute for the Science of Human History.
Rau, D. Victoria 何德華; Dong, Maa-Neu 董瑪女; Chang, Ann Hui-Huan 張惠環 (2012). Dáwù yǔ cídiǎn / Yami (Tao) Dictionary 達悟語詞典 / Yami (Tao) Dictionary (in Chinese and English). Taibei shi: Guoli taiwan daxue chuban zhongxin. ISBN978-986-03-2519-5.
Rau, Der-Hwa 何德華; Dong, Maa-Neu 董瑪女 (2018). Dáwù yǔ yǔfǎ gàilùn 達悟語語法概論[Introduction to Tao Grammar] (in Chinese). Xinbei shi: Yuanzhu minzu weiyuanhui. ISBN978-986-05-5695-7. Archived from the original on 2021-11-04. Retrieved 2021-07-08– via alilin.apc.gov.tw.