נִכמַר הלֵב

Hebrew literary phrase meaning: the heart breaks with mercy; heartfelt compassion; to be deeply touched/heart swells up, with mercy, compassion, sorrow, longing 

Literally: Heart cracks
Source: of the word Ni'Khmar (נכמר) is biblical (Lamentations 5:10- עֹורֵ֙נוּ֙ כְּתַנּ֣וּר נִכְמָ֔רוּ - our skin cracked like an oven)
Usage: used when the heart is poignantly touched by someone/something/story that invokes much heartfelt mercy/compassion/sorrow/longing
Pronounced: Ni'KhMar Ha'Lev