هم

مُهِمٌّ ذ A difficult, an arduous, a distressing, or an afflictive affair, or business: syn. أَمْرٌ شَدِيدٌ: (S:) and مُهِمَّاتٌ signifies أُمُورُ شِدَادٌ, (JK,) affairs of difficulty: and, of importance.