Perhaps from the base of cheimon in the sense of its congener the base of chasma (through the idea of hollowness for grasping); the hand (literally or figuratively (power); especially (by Hebraism) a means or instrument) -- hand.
see GREEK cheimon
see GREEK chasma
χεὶρ (cheir) − 13 Occurrences
χεῖρα (cheira) − 30 Occurrences
χεῖρας (cheiras) − 60 Occurrences
χεῖρες (cheires) − 2 Occurrences
χειρὶ (cheiri) − 20 Occurrences
χειρὸς (cheiros) − 26 Occurrences
χειρῶν (cheirōn) − 18 Occurrences
χερσὶν (chersin) − 10 Occurrences