#2520 καθήκω katheko {kath-ay'-ko}

 from G2596 and G2240}; TDNT - 3:437,385; v

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

 1) to come down
 2) to come to, reach to
    2a) it is becoming
    2b) it is fit

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

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

 AV - fit 1, convenient 1; 2

—Exhaustive Concordance (KJV Translation Frequency & Location)