Here are a few options for a WordPress post_tag description for the title “定終身 (dìng zhōngshēn)” in Traditional Chinese, each with a slightly different nuance:

**Option 1 (Simple & Direct):**

> 找到摯愛、訂下終生的承諾。代表著婚姻，或者深刻的愛情關係。 (Zǎodào zhì’ài, dìng xià zhōngshēng de chéngnuò. Dàibiǎo zhe hūnyīn, huòzhě shēn kè de àiqíng guānxi.)
>
> *Translation: Finding the beloved and making a lifelong commitment. Represents marriage, or a deep love relationship.*

**Why this works:** It’s clear, concise, and provides a general understanding of the tag’s meaning.

**Option 2 (Emphasizing the emotional aspect):**

> 永恆的承諾，深深的愛情。一起走向共同的未來，定下終身的決心。 (Yǒnghéng de chéngnuò, shēn shēn de àiqíng. Yīqǐ zǒuxiàng gòngtóng de wèilái, dìng xià zhōngshēng de juéxīn.)
>
> *Translation: An eternal commitment, profound love. Heading towards a shared future together, making the lifelong decision.*

**Why this works:** It highlights the emotional and aspirational elements often associated with “定終身.”

**Option 3 (More Specific, Suitable for Blog Categories about Relationships):**

> 討論關於婚姻、求婚、訂婚、婚禮，以及伴侶關係的文章。分享如何找到真愛，建立長久的承諾。 (Tǎolùn guānyú hūnyīn, qiúhūn, dìnghūn, hūnlǐ, yǐjí bànlǚ guānxi de wénzhāng. Fēnxiǎng rúhé zhǎodào zhēn’ài, jiànlì chángjiǔ de chéngnuò.)
>
> *Translation: Articles discussing marriage, proposals, engagements, weddings, and partner relationships. Sharing how to find true love and build lasting commitments.*

**Why this works:** This is suitable if the tag is to be used for a blog that focuses on relationship advice, wedding planning, or personal experiences.

**Option 4 (Short & Poetic):**

> 許下終身的誓言，愛情的永恆承諾。 (Xǔ xià zhōngshēng de shìyán, àiqíng de yǒnghéng chéngnuò.)
>
> *Translation: Making a lifelong vow, love’s eternal promise.*

**Why this works:** Short, sweet, and evocative.

**How to use in WordPress:**

1. **Go to your WordPress dashboard.**
2. **Go to Posts > Tags.**
3. **Find the “定終身” tag or add a new one.**
4. **In the “Description” field, paste one of the descriptions above.**
5. **Click “Update” or “Add New Tag.”**

**Choosing the Best Option:**

The best description depends on the overall tone and focus of your blog. Consider your target audience and the type of content associated with the tag to choose the most appropriate option. Good luck!