Meaning of ō:
ō
喔
Interjection
(interjection) oh; I see (used to indicate realization, understanding); Taiwan pr. [wo4]
Wǒ gāngcái cái fǎnyìng guòlái, ō, yuánlái shì zhèyàng!
我刚才才反应过来，喔，原来是这样！
I just realized, oh, so that's how it is!
Dāng tā tīng dào dá'àn shí, tā zhǐshì shuō le yī shēng “wō”.
当他听到答案时，他只是说了一声“喔”。
When he heard the answer, he just said "oh".
Particle
(Tw) (sentence-final particle) (used to convey a friendly tone when giving an admonition or correcting sb etc)
Jìde dài yǔsǎn o, jīntiān kěnéng huì xiàyǔ.
记得带雨伞喔，今天可能会下雨。
Remember to bring an umbrella, it might rain today.
Onomatopoeia
(onom.) cry of a rooster (usu. reduplicated)
Qīngchén de shíhòu, wǒ tīngdào le gōngjī de ō ō shēng.
清晨的时候，我听到了公鸡的喔喔声。
In the early morning, I heard the rooster's crow.
