Strong's #4472: mamror (pronounced mam-rore')
from 4843; a bitterness, i.e. (figuratively) calamity:--bitterness.
Brown-Driver-Briggs Hebrew Lexicon:
mamrôr
1) bitter thing, bitterness
Part of Speech: noun masculine
Relation: from H4843
Usage:
This word is used 1 times:
Job 9:18: "my breath, but filleth me with bitterness."