BT Er 6b(23) :הני אבולי {{דמחוזא}} ^דנהרדעא^ דטימן עד פלגיהו בעפרא‏ : those city-gates of {{Mahoza}} ^Nehardea^ that are covered up half way in dirt
See the entire entry for ṭwm vb. to cover up, envelop s.t.