عَرَجٌ
1.
verbal noun of عَرِجَ: (Msb, TA:) [as a simple subst.,] Natural lameness; (S, O, K;) as also
عُرْجَةٌ, which is likewise a verbal noun of عَرِجَ. (TA.) One says, مَا أَشَدَّ عَرَجَهُ [How great is his natural lameness!]: not مَا أَعْرَجَهُ; for from that which signifies a colour, or a quality in the body, one does not derive the form مَا أَفْعَلَهُ. (S, O.)
2.
Also A river, or rivulet: and a valley: because of their bending, or inclining. (TA.)