Strong's #4787: morrah (pronounced mor-raw')
 a form of 4786; trouble:--bitterness.
Brown-Driver-Briggs Hebrew Lexicon:
 ּ 
  morrâh 
 
 1) bitterness
 
  Part of Speech: noun feminine
Relation: a form of H4786
Usage:
This word is used 1 times:
Proverbs 14:10: "The heart knoweth his own  bitterness; and a stranger doth not intermeddle with his joy."