A primitive root; properly, to be broken up (with any violent action) i.e. (figuratively) to fear -- be grevious (only Isa. 15:4; the rest belong to ra'a').
1 Samuel 1:8 HEB:תֹֽאכְלִ֔י וְלָ֖מֶה יֵרַ֣ע לְבָבֵ֑ךְ הֲל֤וֹא KJV: thou not? and why is thy heart grieved? [am] not I better INT: eat and why grieved is your heart not
2 Samuel 20:6 HEB:אֲבִישַׁ֔י עַתָּ֗ה יֵ֧רַֽע לָ֛נוּ שֶׁ֥בַע KJV: of Bichri do us more harm than [did] Absalom: INT: Abishai Now harm Sheba the son
Job 20:26 HEB:לֹֽא־ נֻפָּ֑ח יֵ֖רַע שָׂרִ֣יד בְּאָהֳלֽוֹ׃ KJV: shall consume him; it shall go ill with him that is left INT: not and unfanned ill the survivor his tent
Psalm 106:32 HEB:מֵ֥י מְרִיבָ֑ה וַיֵּ֥רַע לְ֝מֹשֶׁ֗ה בַּעֲבוּרָֽם׃ KJV: of strife, so that it went ill with Moses INT: the waters provocation ill Moses their account
Isaiah 15:4 HEB:יָרִ֔יעוּ נַפְשׁ֖וֹ יָ֥רְעָה לּֽוֹ׃ NAS: His soul trembles within him. KJV: his life shall be grievous unto him. INT: cry his soul trembles
be timid, weak; 
pious fear; ᵑ7 יְרַע be disheartened) —