رَثْيَةٌ

A pain in the knees and [other] joints: (S:) or a pain in the joints, and in the arms and legs, or hands and feet, or fore and hind legs: (M, K:) or a swelling, (M, K,) and a [malady such as is termed] ظُلَاع, (M,) in the legs of a beast: (M, K:) or anything that prevents a person from rising and going away, or going quickly, occasioned by old age or pain: (M, K, * TA: الاِلْتِفَات in the K is a mistake for الاِنْبِعَاث: TA:) plural رَثَيَاتٌ. (S.)

Also, and ↓ رَثِيَّةٌ, Weakness. (Th, M, K. [او ضَعْفٍ in the CK is a mistake for وَالضَّعْفُ.])

And Foolishness, or stupidity. (Th, M, K.) And you say, فِى أَمْرِهِ رَثْيَةٌ In his affair is a flagging, or remissness, or languor. (M.)