يَعْدُو الرَّهَقَى

He runs quickly, so as to require his pursuer to do what is difficult or what is beyond his power (حَتَّى يُرْهِقَ طَالِبَهُ, or, as in the CK, حتّى يُرْهَقَ طَالِبُهُ [which is virtually the same]): (M, K, TA:) or he runs quickly, so that he almost reaches, or overtakes, (حتّى يَكَادَ يَرْهَقُ,) the object of his pursuit. (JK.)