مرضه doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• مرّضهُ Form 2

  2 مرّضهُ ذ , (S, Mgh, Msb,) inf. n. تَمْرِيضٌ, (S, Msb, K,) He took care of him in his sickness; (Sb, S, Mgh;) and treated him medically, to remove his disease; the measure فَعَّلَ in this instance having a privative qua…

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