Lexical Definition

‎תַּמְרוּר‎ tamrûwr (tam-roor') bitterness H:N-M
from ‎מָרַר‎

[idiom] most bitter(-ly).

1) bitterness

Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
תַמְרוּרִ֔ים bitterness Jer.31.15
תַּמְרוּרִ֑ים bitterness Jer.6.26Hos.12.14

Brown-Driver-Briggs

I. [‎תַּמְרוּר‎] noun masculine bitterness; — only plural intensive ‎תַּמְרוּרִים‎ Hos 12:15* + 2 t.; — ‎׳‎‎מִסְפַּד ת‎ Jer 6:26 mourning of bitterness (bitter mourning), so ‎׳‎‎בְּכִי ת‎ Jer 31:15 (compare the verb Isa 22:4; Zech 12:10); as adverb bitterly Hos 12:15* (si vera lectio). — II. [‎תַּמְרוּר‎ ] see below ‎ת‎.

Brown-Driver-Briggs References

Book Refs
Isaiah 22:4
Jeremiah 6:26 · 31:15
Hosea 12:15*
Zechariah 12:10