ھ ج دh-j-d
(ن) هَجَدَ يَهْجُدُ هُجُوْدًاhajada yahjudu hujūdan: (one of the words with opposite meanings) (1) to sleep at night (2) to stay awake at night. (This verb is not used in the Quran.)
Form V (tafaʿʿul) تَهَجَّدَ يَتَهَجَّدُ تَهَجُّدًاtahajjada yatahajjadu tahajjudan: to forgo sleep and stay awake (with effort), to rise at night for prayer. Only once in the Quran: ﴿وَمِنَ الَّيْلِ فَتَهَجَّدْ بِهِۦ نَافِلَةً لَّكَ﴾ (Al-Isrāʾ 17:79)