Strong's Concordance

Original word: רָתַם
Transliteration: ratham
Definition (short): harness
Definition (full): to bind, attach

NAS Exhaustive Concordance

Word Origin: a prim. root
Definition: to bind, attach
NASB Translation: harness (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

A primitive root; to yoke up (to the pole of a vehicle) -- bind.
KJV: O thou inhabitant of Lachish, bind the chariot to the swift beast: she is the beginning of the sin to the daughter of Zion: for the transgressions of Israel were found in thee.
NASB: Harness the chariot to the team of horses, O inhabitant of Lachish-- She was the beginning of sin To the daughter of Zion-- Because in you were found The rebellious acts of Israel.