— In the bare triliteral (thulāthī mujarrad), يَامَ يَيُوْمُyāma yayūmu is reported, but (this verb is not used in the Quran).
يَوْمٌyawm pl. اَيَّامٌayyām (اصلاً اَيْوَامٌaṣlan aywām, the wāw assimilated into the yāʾ): the time from daybreak to sunset; also any period or span of time (the span in which some event takes place); "اَلْيَوْمُal-yawm" (with the definite article of a known referent, alif lām al-ʿahd) is also used for the Resurrection, and in annexation it forms its various names: يَوْمُ الدِّيْنِyawmu ad-dīn, يَوْمُ الْفَصْلِyawmu al-faṣl, يَوْمُ الْقِيٰمَةِyawmu al-qīmat. ﴿مٰلِكِ يَوْمِ الدِّيْنِ﴾ (Al-Fātiḥah 1:4); ﴿اَيَّامًا مَّعْدُوْدٰتٍ﴾ (Al-Baqarah 2:184); ﴿وَتِلْكَ الْاَيَّامُ نُدَاوِلُهَا بَيْنَ النَّاسِ﴾ (Āl ʿImrān 3:140)