Strong's #7001: qtar (pronounced ket-ar')
(Aramaic) from a root corresponding to 7000; a knot (as tied up), i.e. (figuratively) a riddle; also a vertebra (as if a knot):--doubt, joint.
Brown-Driver-Briggs Hebrew Lexicon:
(Aramaic)
qeṭar
1) knot, joint, problem
1a) joints (of the hip)
1b) difficulties, doubts (figuratively)
Part of Speech: noun masculine
Relation: from a root corresponding to H7000
Usage:
This word is used 3 times:
Daniel 5:6: "was changed, and his thoughts troubled him, so that the joints of his loins were loosed, and his knees smote"
Daniel 5:12: "interpreting of dreams, and showing of hard sentences, and dissolving of doubts, were found in the same Daniel,"
Daniel 5:16: "make interpretations, and dissolve doubts: now if thou canst read"