Strong's Definition
from 4843; bitterness, i.e. (figuratively) grief
KJV Usage: bitterness
STEPBible — Tyndale Abridged Hebrew Lexicon
מְרִירוּת (me.ri.rut) — bitterness. bitterness
UBS Dictionary of Biblical Hebrew
noun f · מרר
Grieve | ≈ שִׁבְרֹון מָתנַיִם
in distress, desperate literally: bitter; hence: = state in which humans are in deep distress
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
מְרִירוּת n.f. bitterness;—Ez 21:11 ref