See the entire entry for rḏūp̄ n.m. runner ahead of a chariot TgJ 2Sam15:1 :וַעְבַד לֵיה אַבשָלוֹם רְתִכִין וְסוּסָוָן :
See the entire entry for rṯiḵ (rṯaḵ), rṯīḵā (rṯikkā) n.m. chariot(ry)