Here are a few descriptions for the WordPress post tag “意外” in Traditional Chinese, ranging in tone and specificity:

**Option 1: Simple & Accessible**

* **Tag Description:** 指意料之外的事情，突發狀況。 (zhǐ yìliào zhīwài de shìqíng, tūfā zhuàngkuàng.) – Refers to unexpected events, unforeseen circumstances.

**Option 2: Slightly More Detailed**

* **Tag Description:** 用於標記經歷或討論的意料之外的事件。 這可能包括驚喜、事故、錯誤以及生活中其他突發的事情。 (Yòngyú biāojì jīnglì huò tǎolùn de yìliào zhīwài de shìjiàn. Zhè kěnéng bāokuò jīngxǐ, shìgù, cuòwù yǐjí shēnghuó zhōng qítā tūfā de shìqíng.) – Used to tag unexpected events experienced or discussed. This can include surprises, accidents, mistakes and other sudden happenings in life.

**Option 3: Focus on a Broader Context (If relevant to your blog theme)**

* **Tag Description:** 探索生活中的意外與不確定性，涵蓋了驚奇、挑戰和轉折。 (Tànsuǒ shēnghuó zhōng de yìwài yǔ bù quèdìngxìng, hángài le jīngqí, tiǎozhàn hé zhuǎnzhé.) – Exploring the unexpected and uncertainty in life, encompassing surprises, challenges, and turning points.

**Option 4: Short and Sweet**

* **Tag Description:** 出乎意料的事。 (Chūhū yìliào de shì.) – Unexpected events.

**Choosing the Right Description:**

Consider these points when selecting the best description for your WordPress post tag “意外”:

* **Your Blog’s Subject Matter:** If your blog covers a specific topic, like travel or news, tailor the description accordingly.
* **Readability:** Make sure it’s easy to understand, even for casual readers.
* **Keyword Density:** Though not the primary focus for tags, if relevant, make sure it contains the title in the description.
* **Length:** Keep it relatively concise. Longer descriptions can be useful for attracting SEO, but generally, tags are best with brief explanations.

Remember to translate the chosen description into Traditional Chinese, of course. Good luck!