Strong's #605: 'anash (pronounced aw-nash')
 a primitive root; to be frail, feeble, or (figuratively) melancholy:--desperate(-ly wicked), incurable, sick, woeful.
Brown-Driver-Briggs Hebrew Lexicon:
 ׁ 
  'ânash 
 
 1) to be weak, sick, frail
 
 1a) (Qal)
 
 1a1) to be incurable
 1a2) to be sick
 1a3) desperate, incurable, desperately wicked, woeful, very sick (passive participle) (metaphorically)
 
 1b) (Niphal) to be sick
 
  Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 9 times:
2 Samuel 12:15: "wife bore unto David,  and it was very sick."
Job 34:6: "against my right? my wound  is incurable without transgression."
Isaiah 17:11: "shall be a heap in the day of grief  and of desperate sorrow."
Jeremiah 15:18: "my pain perpetual, and my wound  incurable, which refuseth to be healed? wilt thou be altogether"
Jeremiah 17:9: "The heart is deceitful above all  things, and desperately wicked: who can know"
Jeremiah 17:16: "from being a pastor to follow thee: neither have I desired  the woeful day; thou knowest:"
Jeremiah 30:12: "saith the LORD, Thy bruise  is incurable, and thy wound is grievous."
Jeremiah 30:15: "thou for thine affliction? thy sorrow  is incurable for the multitude of thine iniquity: because thy sins"
Micah 1:9: "For her wound  is incurable; for it is come unto Judah; he is come"