#0755 אַרְכֻּבָּא 'arkubah (Aramaic) {ar-koo-baw'}

 from an unused root corresponding to H7392 (in the sense of bending
    the knee); TWOT - 2608; n f

—Hebrew Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) knee

—Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

—Strong's (Hebrew & Chaldee Dictionary of the Old Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - knees 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)