ا ب دʾ-b-d
(ض) أَبَدَ يَأْبِدُ أُبُودًاabada yaʾbidu ubūdan: to stay in a place and remain fixed there; also to turn wild in the wilderness, to shy away from man (hence أَوَابِدawābid, a wild animal). The link between the two senses is that whatever remains fixed in its state does not change.
أَبَدabad pl. آبَادābād: time without end, perpetuity.
أَبَدًاabadan: adverb of time (ẓarf zamān), for ever; with a negation it means "never". This root occurs 28 times in the Quran, every time in the adverbial form أَبَدًاabadan: ﴿خٰلِدِيْنَ فِيْهَآ اَبَدًا﴾ (An-Nisāʾ 4:57); ﴿وَلَنْ يَّتَمَنَّوْهُ اَبَدًا﴾ (Al-Baqarah 2:95)