رُطَيْنَاكَ
and رُطَّيْنَاكَ means مَا الذَّى تَرْطُنُ بِهِ [i. e. What is that to which thou alludest, not mentioning it explicitly?]: or مَا رُطَّيْنَاكَهٰذِهِ, and sometimes without teshdeed, means What is [this] thy speech?
Lane's Lexicon — The most scholarly Arabic-English dictionary available
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