Lexical Definition

‎מְרֹר‎ mᵉrôr (mer-ore') bitterness H:N-M
or מְרוֹר mᵉrôwr (mer-ore'); from ‎מָרַר‎

bitter(-ness).

1) bitter thing, bitter herb, bitterness

Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
מְרֹרִ֖ים bitter herbs Exod.12.8
וּמְרֹרִ֖ים and bitter herbs Num.9.11
בַמְּרוֹרִ֖ים with bitter things Lam.3.15

Brown-Driver-Briggs

[‎מָרֹר‎] noun masculine bitter thing, bitter herb (compare Late Hebrew id., bitter herb; on form see BaNB 194); — only plural ‎מְרֹרִים‎ Exod 12:8; Num 9:11, ‎מְרוֺרִים‎ Lam 3:15bitter herbs, in Passover meal Exod 12:8; Num 9:11 (both P); compare ‎׳‎‎הִשְׂבִּיעַנִי בַּמּ‎ Lam 3:15, figurative of distress inflicted (|| ‎לַעֲנָה‎).

Brown-Driver-Briggs References

Book Refs
Exodus 12:8
Numbers 9:11
Lamentations 3:15