Probably denominatively from halah; to remove or be remote -- cast far off.
see HEBREW halah
H1972. hala
[הָלָא] verb denominative only
Niph`al participle feminine Micah 4:7 הַנַּהֲלָאָה (of sheep) removed far off. **We proposes הַנַּחֲלָה (√ חלה) her that is diseased (note "" הַצֹּלֵעָה, and compare Ezekiel 34:21), so Now; Gr הַנִּלְּאָה her that is exhausted; Marti allows either of these.