Lexical Definition

‎קְטַר‎ qᵉṭar (ket-ar') joint ^A:N-M
(Aramaic) from a root corresponding to ‎קָטַר‎

doubt, joint.

• 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)

See Greek: σύνδεσμος

Brown-Driver-Briggs

[‎קְטַר‎] noun masculine^{Dan 5:6} joint, knot; — literal plural construct ‎קִטְרֵי‎ Dan 5:6 joints of his loin; figurative absolute ‎קִטְרִין‎ vDan 5:12 vDan 5:16, usually knotty things, difficulties (Syriac PS³⁵⁹¹); but probably of magic spells, banns (also Syriac PS^l.c., compare Brock^{319 b}), so Bev, see also Dr.

Brown-Driver-Briggs References