Strong's #4786: morah (pronounced mo-raw')
from 4843; bitterness, i.e. (figuratively) trouble:--grief.
Brown-Driver-Briggs Hebrew Lexicon:
môrâh
1) bitterness, grief
Part of Speech: noun feminine
Relation: from H4843
Usage:
This word is used 1 times:
Genesis 26:35: "Which were a grief of mind unto Isaac and to Rebekah."