Strong’s Greek
G2870 — kopetos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
κοπετός
kopetos — pronounced kop-et-os'
from 2875; mourning (properly, by beating the breast):--lamentation. see GREEK for 2875
1 occurrence in the KJV.
Acts 8:2
And devout men carried Stephen to his burial, and made great lamentation over him.