اكتأبَ يكتئب، اكتِئابًا، فهو مُكتَئِب

كئِب؛ اغتمّ وحزن وساءت حالُه، تغيّرت نفسُه من شدّة الحزن والهمّ

🇬🇧 Translation:

became depressed; grieved, became sad and his condition worsened, his psychological state changed due to intense sadness and worry.