ق ف لq-f-l
(ن) قَفَلَ يَقْفُلُ قُفُوْلًاqafala yaqfulu qufūlan: to return; and قَفَلَ الْبَابَqafala al-bāba: to lock a door.
قُفْلqufl pl. أَقْفَالaqfāl: a lock. Only once in the Quran, in the simile of locks upon hearts: ﴿أَفَلَا يَتَدَبَّرُوْنَ الْقُرْآنَ أَمْ عَلٰى قُلُوْبٍ أَقْفَالُهَا﴾ (Muḥammad 47:24).