What is an adjective for a dreaded task?

Here are some adjectives for a dreaded task, depending on the specific feeling you want to convey:

General Dread:

* Dreaded

* Looming

* Formidable

* Daunting

* Unwelcome

* Hateful

* Repugnant

Feeling of Burden:

* Burdensome

* Oppressive

* Cumbersome

* Arduous

* Taxing

Feeling of Fear or Anxiety:

* Terrifying

* Appalling

* Horrifying

* Anxiety-inducing

* Nerve-wracking

Feeling of Dislike or Aversion:

* Disagreeable

* Unpleasant

* Abhorrent

* Repulsive

* Detestable

The best adjective will depend on the specific context and the emotions you want to highlight.