B1verb
خَتَمَ
khatama
he sealed / he concluded
Example
خَتَمَ اللَّهُ عَلَى قُلُوبِهِمْ وَعَلَى سَمْعِهِمْ
khatama Allāhu ʿalā qulūbihim wa-ʿalā samʿihim
Allah has set a seal upon their hearts and upon their hearing (2:7)
Grammar
Form I verb. Noun: خَاتَمٌ (seal/ring). خَاتِمُ النَّبِيِّينَ (Seal of the Prophets, 33:40). Present: يَخْتِمُ.
Culture
Muhammad ﷺ is called Khātam an-Nabiyyīn (Seal of the Prophets) — the final prophet, after whom no new prophet will come.