קְטַר qᵉṭar (H7001)

a knot (as tied up), i.e. (figuratively) a riddle; also a vertebra (as if a knot)

1) knot, joint, problem 1a) joints (of the hip) 1b) difficulties, doubts (fig)

(Aramaic) from a root corresponding to קָטַר (H7000);