(Latin: bend, bending; curve, curving; turn, turning)

(Greek: turning, spinning, whirling, bend, circular motion; originally, "circle, curved, ring")

(Greek > Latin: bearer, to bear, carrying; producing, transmission; directing, turning; originally to carry or to bear children)

(Latin: curve, curving; winding; turning; hollow)

(Greek, speira > Latin, spira: coil, coiled; twisted, turning)

(Greek: turning like oxen in plowing; alternate lines in opposite directions; zig-zag procedure)

(Latin: reciprocus, turning back the same way, alternating; turning backward and forward; to give, to do, to feel, or to show in return)

(Greek: bend, curve, turn, a turning; response to stimulus)