مطمورة

Etymology 1
From the root. Deemed by Fraenkel to reek of from  by reason of the Arabic root missing the meaning “to store” in the old poetry, and indeed from what the web databases of Qaṣāʾid and ʾAḥādīṯ return by 2019  is absent. Compare against 🇨🇬.

Noun

 * 1) underground storage room dug to preserve foodstuff, a granary, subterranean silo