Strong’s Hebrew
H4814 — mriyruwth
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
מְרִירוּת
mriyruwth — pronounced mer-ee-rooth
from 4843; bitterness, i.e. (figuratively) grief:--bitterness. see H04843
1 occurrence in the KJV.
Ezekiel 21:6
Sigh therefore, thou son of man, with the breaking of thy loins; and with bitterness sigh before their eyes.