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').
see HEBREW ra'a'
[יָרַע] verb quiver (compare Arabic be timid, weak; pious fear; יְרַע ᵑ7 be disheartened) —
Qal Perfect3feminine singular לוֺ יָָֽרְעָה נַפְשׁוֺ Isaiah 15:4 his soul quivereth to him, i.e. is in terror and distress.