עָקַב ʻâqab (H6117)

to seize by the heel; figuratively, to circumvent (as if tripping up the heels); also to restrain (as if holding by the heel)

1) to supplant, circumvent, take by the heel, follow at the heel, assail insidiously, overreach 1a) (Qal) to supplant, overreach, attack at the heel 1b) (Piel) to hold back

a primitive root; properly, to swell out or up; used only as denominative from עָקֵב (H6119),