Here are a few options for a description of the WordPress post tag “夢魘” (Nightmare) in Traditional Chinese, catering to different potential uses:

**Option 1: Concise & General**

* **Description:** 關於惡夢和恐怖的內容。 (Regarding nightmares and terrifying content.)

**Option 2: Slightly More Descriptive**

* **Description:** 標示涉及噩夢、夢境恐怖、或黑暗心理的相關帖子。 (Tags encompassing posts related to nightmares, dream terrors, or dark psychological themes.)

**Option 3: Emphasis on the Experiential**

* **Description:** 探索令人不安的夢境、恐懼和潛意識的相關文章，帶您深入惡夢的世界。 (Exploring articles related to disturbing dreams, fears, and the subconscious, taking you deep into the world of nightmares.)

**Option 4: Literary or Evocative**

* **Description:** 噩夢的陰影、潛意識的深淵、恐懼的具現。 (The shadows of nightmares, the abyss of the subconscious, the embodiment of fear.)

**Option 5: More Technical (If used for categorizing content details)**

* **Description:** 用於標記涉及夢境、失眠、心理創傷、恐懼症等相關文章。 (Used to tag articles related to dreams, insomnia, psychological trauma, phobias, etc.)

**Which option to choose depends on:**

* **The type of content you’re tagging:** Is it fiction, personal accounts, medical information, etc.?
* **Your target audience:** Are you aiming for a general audience or a more specialized readership?
* **The tone of your website/blog:** Is it casual, serious, literary, etc.?

No matter which you choose, be sure the description accurately reflects the type of content the tag will be applied to!