(ن) نَسَكَ يَنْسُكُ نَسْكًا وَنُسُكًاnasaka yansuku naskan wa-nusukan: to become a devout worshipper, to worship; to offer a sacrifice. (This verb is not used in the Quran.)
نُسُكٌnusuk (verbal noun, maṣdar, also a noun, ism dhāt): a sacrifice; also worship. ﴿قُلْ اِنَّ صَلَاتِيْ وَنُسُكِيْ وَمَحْيَايَ وَمَمَاتِيْ لِلّٰهِ رَبِّ الْعٰلَمِيْنَ﴾ (Al-Anʿām 6:162); ﴿فَفِدْيَةٌ مِّنْ صِيَامٍ اَوْ صَدَقَةٍ اَوْ نُسُكٍ﴾ (Al-Baqarah 2:196)
نَاسِكٌnāsik pl. نَاسِكُوْنَnāsikūna (active participle, ism fāʿil): a worshipper, one who follows a way of worship. ﴿لِكُلِّ اُمَّةٍ جَعَلْنَا مَنْسَكًا هُمْ نَاسِكُوْهُ﴾ (Al-Ḥajj 22:67)
مَنْسَكٌmansak pl. مَنَاسِكُmanāsiku (noun of time or place, ẓarf, on the pattern of مَفْعَلٌmafʿal): a place of worship; metaphorically a way of worship. ﴿وَاَرِنَا مَنَاسِكَنَا﴾ (Al-Baqarah 2:128); ﴿وَلِكُلِّ اُمَّةٍ جَعَلْنَا مَنْسَكًا لِّيَذْكُرُوا اسْمَ اللّٰهِ﴾ (Al-Ḥajj 22:34)