prickly

Short definition from Wiktionary

Adjective

1. 1
   Covered with sharp points.
2. 2
   Easily irritated.
3. 3
   Difficult; complicated; hairy or thorny.

Adverb

1. 1
   In a prickly manner.

Noun

1. 1
   Something that gives a pricking sensation; a sharp object.