(Aramaic) from a root corresponding to qatar; a knot (as tied up), i.e. (figuratively) a riddle; also a vertebra (as if a knot) -- doubt, joint.
see HEBREW qatar
H7001. qetar
[קְטַר] noun masculineDaniel 5:6 joint, knot; — literal plural construct קִטְרֵי 5:6 joints of his loin; figurative absolute קִטְרִין 5:12; 5:16, usually knotty things, difficulties (Syriac PS3591); but probably of magic spells, banns (also Syriac PSl.c., compare Brock319b), so Bev, see also Dr.